MC	<p>064d_88f0</p> <p><strong>Pyrophosphoric acid</strong> and its conjugate base, pyrophosphate, is abbreviated PP<sub>i</sub> and is formed by cells from the hydrolysis of ATP into AMP.</p> <p>Pyrophosphoric acid is tetraprotic with pK<sub>a</sub> values of <strong>0.91</strong>, <strong>2.10</strong>, <strong>6.70</strong>, and <strong>9.32</strong>.</p> <p>Pyrophosphoric acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 10.5</strong>?</p>	A. <span style="color: #00008B">H<sub>4</sub>P<sub>2</sub>O<sub>7</sub></span>	Incorrect	B. <span style="color: #202060">H<sub>3</sub>P<sub>2</sub>O<sub>7</sub><sup>-</sup></span>	Incorrect	C. <span style="color: #404040">H<sub>2</sub>P<sub>2</sub>O<sub>7</sub><sup>2-</sup></span>	Incorrect	D. <span style="color: #602020">HP<sub>2</sub>O<sub>7</sub><sup>3-</sup></span>	Incorrect	E. <span style="color: #8B0000">P<sub>2</sub>O<sub>7</sub><sup>4-</sup></span>	Correct
MC	<p>064d_f577</p> <p><strong>Pyrophosphoric acid</strong> and its conjugate base, pyrophosphate, is abbreviated PP<sub>i</sub> and is formed by cells from the hydrolysis of ATP into AMP.</p> <p>Pyrophosphoric acid is tetraprotic with pK<sub>a</sub> values of <strong>0.91</strong>, <strong>2.10</strong>, <strong>6.70</strong>, and <strong>9.32</strong>.</p> <p>Pyrophosphoric acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 10.5</strong>?</p>	A. <span style="color: #8B0000">P<sub>2</sub>O<sub>7</sub><sup>4-</sup></span>	Correct	B. <span style="color: #602020">HP<sub>2</sub>O<sub>7</sub><sup>3-</sup></span>	Incorrect	C. <span style="color: #404040">H<sub>2</sub>P<sub>2</sub>O<sub>7</sub><sup>2-</sup></span>	Incorrect	D. <span style="color: #202060">H<sub>3</sub>P<sub>2</sub>O<sub>7</sub><sup>-</sup></span>	Incorrect	E. <span style="color: #00008B">H<sub>4</sub>P<sub>2</sub>O<sub>7</sub></span>	Incorrect
MC	<p>1a0e_8632</p> <p><strong>Ethylenediaminetetraacetic acid</strong> and its conjugate base, EDTA, is commonly used in chelation therapy and as a chelating agent in biochemical experiments..</p> <p>Ethylenediaminetetraacetic acid is tetraprotic with pK<sub>a</sub> values of <strong>2.00</strong>, <strong>2.67</strong>, <strong>6.16</strong>, and <strong>10.26</strong>.</p> <p>Ethylenediaminetetraacetic acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 0.5</strong>?</p>	A. <span style="color: #00008B">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>6</sub>N<sub>2</sub>O<sub>8</sub></span>	Correct	B. <span style="color: #202060">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>5</sub>N<sub>2</sub>O<sub>8</sub><sup>-</sup></span>	Incorrect	C. <span style="color: #404040">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>4</sub>N<sub>2</sub>O<sub>8</sub><sup>2-</sup></span>	Incorrect	D. <span style="color: #602020">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>3</sub>N<sub>2</sub>O<sub>8</sub><sup>3-</sup></span>	Incorrect	E. <span style="color: #8B0000">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>2</sub>N<sub>2</sub>O<sub>8</sub><sup>4-</sup></span>	Incorrect
MC	<p>1a0e_f89e</p> <p><strong>Ethylenediaminetetraacetic acid</strong> and its conjugate base, EDTA, is commonly used in chelation therapy and as a chelating agent in biochemical experiments..</p> <p>Ethylenediaminetetraacetic acid is tetraprotic with pK<sub>a</sub> values of <strong>2.00</strong>, <strong>2.67</strong>, <strong>6.16</strong>, and <strong>10.26</strong>.</p> <p>Ethylenediaminetetraacetic acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 0.5</strong>?</p>	A. <span style="color: #8B0000">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>2</sub>N<sub>2</sub>O<sub>8</sub><sup>4-</sup></span>	Incorrect	B. <span style="color: #602020">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>3</sub>N<sub>2</sub>O<sub>8</sub><sup>3-</sup></span>	Incorrect	C. <span style="color: #404040">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>4</sub>N<sub>2</sub>O<sub>8</sub><sup>2-</sup></span>	Incorrect	D. <span style="color: #202060">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>5</sub>N<sub>2</sub>O<sub>8</sub><sup>-</sup></span>	Incorrect	E. <span style="color: #00008B">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>6</sub>N<sub>2</sub>O<sub>8</sub></span>	Correct
MC	<p>1a7c_8632</p> <p><strong>Ethylenediaminetetraacetic acid</strong> and its conjugate base, EDTA, is commonly used in chelation therapy and as a chelating agent in biochemical experiments..</p> <p>Ethylenediaminetetraacetic acid is tetraprotic with pK<sub>a</sub> values of <strong>2.00</strong>, <strong>2.67</strong>, <strong>6.16</strong>, and <strong>10.26</strong>.</p> <p>Ethylenediaminetetraacetic acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 3.5</strong>?</p>	A. <span style="color: #00008B">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>6</sub>N<sub>2</sub>O<sub>8</sub></span>	Incorrect	B. <span style="color: #202060">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>5</sub>N<sub>2</sub>O<sub>8</sub><sup>-</sup></span>	Incorrect	C. <span style="color: #404040">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>4</sub>N<sub>2</sub>O<sub>8</sub><sup>2-</sup></span>	Correct	D. <span style="color: #602020">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>3</sub>N<sub>2</sub>O<sub>8</sub><sup>3-</sup></span>	Incorrect	E. <span style="color: #8B0000">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>2</sub>N<sub>2</sub>O<sub>8</sub><sup>4-</sup></span>	Incorrect
MC	<p>1a7c_f89e</p> <p><strong>Ethylenediaminetetraacetic acid</strong> and its conjugate base, EDTA, is commonly used in chelation therapy and as a chelating agent in biochemical experiments..</p> <p>Ethylenediaminetetraacetic acid is tetraprotic with pK<sub>a</sub> values of <strong>2.00</strong>, <strong>2.67</strong>, <strong>6.16</strong>, and <strong>10.26</strong>.</p> <p>Ethylenediaminetetraacetic acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 3.5</strong>?</p>	A. <span style="color: #8B0000">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>2</sub>N<sub>2</sub>O<sub>8</sub><sup>4-</sup></span>	Incorrect	B. <span style="color: #602020">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>3</sub>N<sub>2</sub>O<sub>8</sub><sup>3-</sup></span>	Incorrect	C. <span style="color: #404040">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>4</sub>N<sub>2</sub>O<sub>8</sub><sup>2-</sup></span>	Correct	D. <span style="color: #202060">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>5</sub>N<sub>2</sub>O<sub>8</sub><sup>-</sup></span>	Incorrect	E. <span style="color: #00008B">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>6</sub>N<sub>2</sub>O<sub>8</sub></span>	Incorrect
MC	<p>1a98_8632</p> <p><strong>Ethylenediaminetetraacetic acid</strong> and its conjugate base, EDTA, is commonly used in chelation therapy and as a chelating agent in biochemical experiments..</p> <p>Ethylenediaminetetraacetic acid is tetraprotic with pK<sub>a</sub> values of <strong>2.00</strong>, <strong>2.67</strong>, <strong>6.16</strong>, and <strong>10.26</strong>.</p> <p>Ethylenediaminetetraacetic acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 5.5</strong>?</p>	A. <span style="color: #00008B">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>6</sub>N<sub>2</sub>O<sub>8</sub></span>	Incorrect	B. <span style="color: #202060">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>5</sub>N<sub>2</sub>O<sub>8</sub><sup>-</sup></span>	Incorrect	C. <span style="color: #404040">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>4</sub>N<sub>2</sub>O<sub>8</sub><sup>2-</sup></span>	Correct	D. <span style="color: #602020">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>3</sub>N<sub>2</sub>O<sub>8</sub><sup>3-</sup></span>	Incorrect	E. <span style="color: #8B0000">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>2</sub>N<sub>2</sub>O<sub>8</sub><sup>4-</sup></span>	Incorrect
MC	<p>1a98_f89e</p> <p><strong>Ethylenediaminetetraacetic acid</strong> and its conjugate base, EDTA, is commonly used in chelation therapy and as a chelating agent in biochemical experiments..</p> <p>Ethylenediaminetetraacetic acid is tetraprotic with pK<sub>a</sub> values of <strong>2.00</strong>, <strong>2.67</strong>, <strong>6.16</strong>, and <strong>10.26</strong>.</p> <p>Ethylenediaminetetraacetic acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 5.5</strong>?</p>	A. <span style="color: #8B0000">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>2</sub>N<sub>2</sub>O<sub>8</sub><sup>4-</sup></span>	Incorrect	B. <span style="color: #602020">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>3</sub>N<sub>2</sub>O<sub>8</sub><sup>3-</sup></span>	Incorrect	C. <span style="color: #404040">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>4</sub>N<sub>2</sub>O<sub>8</sub><sup>2-</sup></span>	Correct	D. <span style="color: #202060">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>5</sub>N<sub>2</sub>O<sub>8</sub><sup>-</sup></span>	Incorrect	E. <span style="color: #00008B">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>6</sub>N<sub>2</sub>O<sub>8</sub></span>	Incorrect
MC	<p>1b50_8632</p> <p><strong>Ethylenediaminetetraacetic acid</strong> and its conjugate base, EDTA, is commonly used in chelation therapy and as a chelating agent in biochemical experiments..</p> <p>Ethylenediaminetetraacetic acid is tetraprotic with pK<sub>a</sub> values of <strong>2.00</strong>, <strong>2.67</strong>, <strong>6.16</strong>, and <strong>10.26</strong>.</p> <p>Ethylenediaminetetraacetic acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 9.5</strong>?</p>	A. <span style="color: #00008B">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>6</sub>N<sub>2</sub>O<sub>8</sub></span>	Incorrect	B. <span style="color: #202060">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>5</sub>N<sub>2</sub>O<sub>8</sub><sup>-</sup></span>	Incorrect	C. <span style="color: #404040">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>4</sub>N<sub>2</sub>O<sub>8</sub><sup>2-</sup></span>	Incorrect	D. <span style="color: #602020">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>3</sub>N<sub>2</sub>O<sub>8</sub><sup>3-</sup></span>	Correct	E. <span style="color: #8B0000">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>2</sub>N<sub>2</sub>O<sub>8</sub><sup>4-</sup></span>	Incorrect
MC	<p>1b50_f89e</p> <p><strong>Ethylenediaminetetraacetic acid</strong> and its conjugate base, EDTA, is commonly used in chelation therapy and as a chelating agent in biochemical experiments..</p> <p>Ethylenediaminetetraacetic acid is tetraprotic with pK<sub>a</sub> values of <strong>2.00</strong>, <strong>2.67</strong>, <strong>6.16</strong>, and <strong>10.26</strong>.</p> <p>Ethylenediaminetetraacetic acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 9.5</strong>?</p>	A. <span style="color: #8B0000">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>2</sub>N<sub>2</sub>O<sub>8</sub><sup>4-</sup></span>	Incorrect	B. <span style="color: #602020">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>3</sub>N<sub>2</sub>O<sub>8</sub><sup>3-</sup></span>	Correct	C. <span style="color: #404040">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>4</sub>N<sub>2</sub>O<sub>8</sub><sup>2-</sup></span>	Incorrect	D. <span style="color: #202060">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>5</sub>N<sub>2</sub>O<sub>8</sub><sup>-</sup></span>	Incorrect	E. <span style="color: #00008B">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>6</sub>N<sub>2</sub>O<sub>8</sub></span>	Incorrect
MC	<p>2ebb_88f0</p> <p><strong>Pyrophosphoric acid</strong> and its conjugate base, pyrophosphate, is abbreviated PP<sub>i</sub> and is formed by cells from the hydrolysis of ATP into AMP.</p> <p>Pyrophosphoric acid is tetraprotic with pK<sub>a</sub> values of <strong>0.91</strong>, <strong>2.10</strong>, <strong>6.70</strong>, and <strong>9.32</strong>.</p> <p>Pyrophosphoric acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 10.0</strong>?</p>	A. <span style="color: #00008B">H<sub>4</sub>P<sub>2</sub>O<sub>7</sub></span>	Incorrect	B. <span style="color: #202060">H<sub>3</sub>P<sub>2</sub>O<sub>7</sub><sup>-</sup></span>	Incorrect	C. <span style="color: #404040">H<sub>2</sub>P<sub>2</sub>O<sub>7</sub><sup>2-</sup></span>	Incorrect	D. <span style="color: #602020">HP<sub>2</sub>O<sub>7</sub><sup>3-</sup></span>	Incorrect	E. <span style="color: #8B0000">P<sub>2</sub>O<sub>7</sub><sup>4-</sup></span>	Correct
MC	<p>2ebb_f577</p> <p><strong>Pyrophosphoric acid</strong> and its conjugate base, pyrophosphate, is abbreviated PP<sub>i</sub> and is formed by cells from the hydrolysis of ATP into AMP.</p> <p>Pyrophosphoric acid is tetraprotic with pK<sub>a</sub> values of <strong>0.91</strong>, <strong>2.10</strong>, <strong>6.70</strong>, and <strong>9.32</strong>.</p> <p>Pyrophosphoric acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 10.0</strong>?</p>	A. <span style="color: #8B0000">P<sub>2</sub>O<sub>7</sub><sup>4-</sup></span>	Correct	B. <span style="color: #602020">HP<sub>2</sub>O<sub>7</sub><sup>3-</sup></span>	Incorrect	C. <span style="color: #404040">H<sub>2</sub>P<sub>2</sub>O<sub>7</sub><sup>2-</sup></span>	Incorrect	D. <span style="color: #202060">H<sub>3</sub>P<sub>2</sub>O<sub>7</sub><sup>-</sup></span>	Incorrect	E. <span style="color: #00008B">H<sub>4</sub>P<sub>2</sub>O<sub>7</sub></span>	Incorrect
MC	<p>326e_8632</p> <p><strong>Ethylenediaminetetraacetic acid</strong> and its conjugate base, EDTA, is commonly used in chelation therapy and as a chelating agent in biochemical experiments..</p> <p>Ethylenediaminetetraacetic acid is tetraprotic with pK<sub>a</sub> values of <strong>2.00</strong>, <strong>2.67</strong>, <strong>6.16</strong>, and <strong>10.26</strong>.</p> <p>Ethylenediaminetetraacetic acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 5.0</strong>?</p>	A. <span style="color: #00008B">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>6</sub>N<sub>2</sub>O<sub>8</sub></span>	Incorrect	B. <span style="color: #202060">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>5</sub>N<sub>2</sub>O<sub>8</sub><sup>-</sup></span>	Incorrect	C. <span style="color: #404040">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>4</sub>N<sub>2</sub>O<sub>8</sub><sup>2-</sup></span>	Correct	D. <span style="color: #602020">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>3</sub>N<sub>2</sub>O<sub>8</sub><sup>3-</sup></span>	Incorrect	E. <span style="color: #8B0000">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>2</sub>N<sub>2</sub>O<sub>8</sub><sup>4-</sup></span>	Incorrect
MC	<p>326e_f89e</p> <p><strong>Ethylenediaminetetraacetic acid</strong> and its conjugate base, EDTA, is commonly used in chelation therapy and as a chelating agent in biochemical experiments..</p> <p>Ethylenediaminetetraacetic acid is tetraprotic with pK<sub>a</sub> values of <strong>2.00</strong>, <strong>2.67</strong>, <strong>6.16</strong>, and <strong>10.26</strong>.</p> <p>Ethylenediaminetetraacetic acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 5.0</strong>?</p>	A. <span style="color: #8B0000">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>2</sub>N<sub>2</sub>O<sub>8</sub><sup>4-</sup></span>	Incorrect	B. <span style="color: #602020">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>3</sub>N<sub>2</sub>O<sub>8</sub><sup>3-</sup></span>	Incorrect	C. <span style="color: #404040">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>4</sub>N<sub>2</sub>O<sub>8</sub><sup>2-</sup></span>	Correct	D. <span style="color: #202060">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>5</sub>N<sub>2</sub>O<sub>8</sub><sup>-</sup></span>	Incorrect	E. <span style="color: #00008B">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>6</sub>N<sub>2</sub>O<sub>8</sub></span>	Incorrect
MC	<p>33a6_8632</p> <p><strong>Ethylenediaminetetraacetic acid</strong> and its conjugate base, EDTA, is commonly used in chelation therapy and as a chelating agent in biochemical experiments..</p> <p>Ethylenediaminetetraacetic acid is tetraprotic with pK<sub>a</sub> values of <strong>2.00</strong>, <strong>2.67</strong>, <strong>6.16</strong>, and <strong>10.26</strong>.</p> <p>Ethylenediaminetetraacetic acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 9.0</strong>?</p>	A. <span style="color: #00008B">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>6</sub>N<sub>2</sub>O<sub>8</sub></span>	Incorrect	B. <span style="color: #202060">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>5</sub>N<sub>2</sub>O<sub>8</sub><sup>-</sup></span>	Incorrect	C. <span style="color: #404040">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>4</sub>N<sub>2</sub>O<sub>8</sub><sup>2-</sup></span>	Incorrect	D. <span style="color: #602020">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>3</sub>N<sub>2</sub>O<sub>8</sub><sup>3-</sup></span>	Correct	E. <span style="color: #8B0000">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>2</sub>N<sub>2</sub>O<sub>8</sub><sup>4-</sup></span>	Incorrect
MC	<p>33a6_f89e</p> <p><strong>Ethylenediaminetetraacetic acid</strong> and its conjugate base, EDTA, is commonly used in chelation therapy and as a chelating agent in biochemical experiments..</p> <p>Ethylenediaminetetraacetic acid is tetraprotic with pK<sub>a</sub> values of <strong>2.00</strong>, <strong>2.67</strong>, <strong>6.16</strong>, and <strong>10.26</strong>.</p> <p>Ethylenediaminetetraacetic acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 9.0</strong>?</p>	A. <span style="color: #8B0000">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>2</sub>N<sub>2</sub>O<sub>8</sub><sup>4-</sup></span>	Incorrect	B. <span style="color: #602020">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>3</sub>N<sub>2</sub>O<sub>8</sub><sup>3-</sup></span>	Correct	C. <span style="color: #404040">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>4</sub>N<sub>2</sub>O<sub>8</sub><sup>2-</sup></span>	Incorrect	D. <span style="color: #202060">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>5</sub>N<sub>2</sub>O<sub>8</sub><sup>-</sup></span>	Incorrect	E. <span style="color: #00008B">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>6</sub>N<sub>2</sub>O<sub>8</sub></span>	Incorrect
MC	<p>400b_8632</p> <p><strong>Ethylenediaminetetraacetic acid</strong> and its conjugate base, EDTA, is commonly used in chelation therapy and as a chelating agent in biochemical experiments..</p> <p>Ethylenediaminetetraacetic acid is tetraprotic with pK<sub>a</sub> values of <strong>2.00</strong>, <strong>2.67</strong>, <strong>6.16</strong>, and <strong>10.26</strong>.</p> <p>Ethylenediaminetetraacetic acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 12.0</strong>?</p>	A. <span style="color: #00008B">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>6</sub>N<sub>2</sub>O<sub>8</sub></span>	Incorrect	B. <span style="color: #202060">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>5</sub>N<sub>2</sub>O<sub>8</sub><sup>-</sup></span>	Incorrect	C. <span style="color: #404040">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>4</sub>N<sub>2</sub>O<sub>8</sub><sup>2-</sup></span>	Incorrect	D. <span style="color: #602020">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>3</sub>N<sub>2</sub>O<sub>8</sub><sup>3-</sup></span>	Incorrect	E. <span style="color: #8B0000">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>2</sub>N<sub>2</sub>O<sub>8</sub><sup>4-</sup></span>	Correct
MC	<p>400b_f89e</p> <p><strong>Ethylenediaminetetraacetic acid</strong> and its conjugate base, EDTA, is commonly used in chelation therapy and as a chelating agent in biochemical experiments..</p> <p>Ethylenediaminetetraacetic acid is tetraprotic with pK<sub>a</sub> values of <strong>2.00</strong>, <strong>2.67</strong>, <strong>6.16</strong>, and <strong>10.26</strong>.</p> <p>Ethylenediaminetetraacetic acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 12.0</strong>?</p>	A. <span style="color: #8B0000">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>2</sub>N<sub>2</sub>O<sub>8</sub><sup>4-</sup></span>	Correct	B. <span style="color: #602020">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>3</sub>N<sub>2</sub>O<sub>8</sub><sup>3-</sup></span>	Incorrect	C. <span style="color: #404040">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>4</sub>N<sub>2</sub>O<sub>8</sub><sup>2-</sup></span>	Incorrect	D. <span style="color: #202060">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>5</sub>N<sub>2</sub>O<sub>8</sub><sup>-</sup></span>	Incorrect	E. <span style="color: #00008B">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>6</sub>N<sub>2</sub>O<sub>8</sub></span>	Incorrect
MC	<p>4079_8632</p> <p><strong>Ethylenediaminetetraacetic acid</strong> and its conjugate base, EDTA, is commonly used in chelation therapy and as a chelating agent in biochemical experiments..</p> <p>Ethylenediaminetetraacetic acid is tetraprotic with pK<sub>a</sub> values of <strong>2.00</strong>, <strong>2.67</strong>, <strong>6.16</strong>, and <strong>10.26</strong>.</p> <p>Ethylenediaminetetraacetic acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 11.0</strong>?</p>	A. <span style="color: #00008B">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>6</sub>N<sub>2</sub>O<sub>8</sub></span>	Incorrect	B. <span style="color: #202060">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>5</sub>N<sub>2</sub>O<sub>8</sub><sup>-</sup></span>	Incorrect	C. <span style="color: #404040">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>4</sub>N<sub>2</sub>O<sub>8</sub><sup>2-</sup></span>	Incorrect	D. <span style="color: #602020">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>3</sub>N<sub>2</sub>O<sub>8</sub><sup>3-</sup></span>	Incorrect	E. <span style="color: #8B0000">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>2</sub>N<sub>2</sub>O<sub>8</sub><sup>4-</sup></span>	Correct
MC	<p>4079_f89e</p> <p><strong>Ethylenediaminetetraacetic acid</strong> and its conjugate base, EDTA, is commonly used in chelation therapy and as a chelating agent in biochemical experiments..</p> <p>Ethylenediaminetetraacetic acid is tetraprotic with pK<sub>a</sub> values of <strong>2.00</strong>, <strong>2.67</strong>, <strong>6.16</strong>, and <strong>10.26</strong>.</p> <p>Ethylenediaminetetraacetic acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 11.0</strong>?</p>	A. <span style="color: #8B0000">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>2</sub>N<sub>2</sub>O<sub>8</sub><sup>4-</sup></span>	Correct	B. <span style="color: #602020">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>3</sub>N<sub>2</sub>O<sub>8</sub><sup>3-</sup></span>	Incorrect	C. <span style="color: #404040">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>4</sub>N<sub>2</sub>O<sub>8</sub><sup>2-</sup></span>	Incorrect	D. <span style="color: #202060">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>5</sub>N<sub>2</sub>O<sub>8</sub><sup>-</sup></span>	Incorrect	E. <span style="color: #00008B">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>6</sub>N<sub>2</sub>O<sub>8</sub></span>	Incorrect
MC	<p>58e3_88f0</p> <p><strong>Pyrophosphoric acid</strong> and its conjugate base, pyrophosphate, is abbreviated PP<sub>i</sub> and is formed by cells from the hydrolysis of ATP into AMP.</p> <p>Pyrophosphoric acid is tetraprotic with pK<sub>a</sub> values of <strong>0.91</strong>, <strong>2.10</strong>, <strong>6.70</strong>, and <strong>9.32</strong>.</p> <p>Pyrophosphoric acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 4.0</strong>?</p>	A. <span style="color: #00008B">H<sub>4</sub>P<sub>2</sub>O<sub>7</sub></span>	Incorrect	B. <span style="color: #202060">H<sub>3</sub>P<sub>2</sub>O<sub>7</sub><sup>-</sup></span>	Incorrect	C. <span style="color: #404040">H<sub>2</sub>P<sub>2</sub>O<sub>7</sub><sup>2-</sup></span>	Correct	D. <span style="color: #602020">HP<sub>2</sub>O<sub>7</sub><sup>3-</sup></span>	Incorrect	E. <span style="color: #8B0000">P<sub>2</sub>O<sub>7</sub><sup>4-</sup></span>	Incorrect
MC	<p>58e3_f577</p> <p><strong>Pyrophosphoric acid</strong> and its conjugate base, pyrophosphate, is abbreviated PP<sub>i</sub> and is formed by cells from the hydrolysis of ATP into AMP.</p> <p>Pyrophosphoric acid is tetraprotic with pK<sub>a</sub> values of <strong>0.91</strong>, <strong>2.10</strong>, <strong>6.70</strong>, and <strong>9.32</strong>.</p> <p>Pyrophosphoric acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 4.0</strong>?</p>	A. <span style="color: #8B0000">P<sub>2</sub>O<sub>7</sub><sup>4-</sup></span>	Incorrect	B. <span style="color: #602020">HP<sub>2</sub>O<sub>7</sub><sup>3-</sup></span>	Incorrect	C. <span style="color: #404040">H<sub>2</sub>P<sub>2</sub>O<sub>7</sub><sup>2-</sup></span>	Correct	D. <span style="color: #202060">H<sub>3</sub>P<sub>2</sub>O<sub>7</sub><sup>-</sup></span>	Incorrect	E. <span style="color: #00008B">H<sub>4</sub>P<sub>2</sub>O<sub>7</sub></span>	Incorrect
MC	<p>592b_88f0</p> <p><strong>Pyrophosphoric acid</strong> and its conjugate base, pyrophosphate, is abbreviated PP<sub>i</sub> and is formed by cells from the hydrolysis of ATP into AMP.</p> <p>Pyrophosphoric acid is tetraprotic with pK<sub>a</sub> values of <strong>0.91</strong>, <strong>2.10</strong>, <strong>6.70</strong>, and <strong>9.32</strong>.</p> <p>Pyrophosphoric acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 8.0</strong>?</p>	A. <span style="color: #00008B">H<sub>4</sub>P<sub>2</sub>O<sub>7</sub></span>	Incorrect	B. <span style="color: #202060">H<sub>3</sub>P<sub>2</sub>O<sub>7</sub><sup>-</sup></span>	Incorrect	C. <span style="color: #404040">H<sub>2</sub>P<sub>2</sub>O<sub>7</sub><sup>2-</sup></span>	Incorrect	D. <span style="color: #602020">HP<sub>2</sub>O<sub>7</sub><sup>3-</sup></span>	Correct	E. <span style="color: #8B0000">P<sub>2</sub>O<sub>7</sub><sup>4-</sup></span>	Incorrect
MC	<p>592b_f577</p> <p><strong>Pyrophosphoric acid</strong> and its conjugate base, pyrophosphate, is abbreviated PP<sub>i</sub> and is formed by cells from the hydrolysis of ATP into AMP.</p> <p>Pyrophosphoric acid is tetraprotic with pK<sub>a</sub> values of <strong>0.91</strong>, <strong>2.10</strong>, <strong>6.70</strong>, and <strong>9.32</strong>.</p> <p>Pyrophosphoric acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 8.0</strong>?</p>	A. <span style="color: #8B0000">P<sub>2</sub>O<sub>7</sub><sup>4-</sup></span>	Incorrect	B. <span style="color: #602020">HP<sub>2</sub>O<sub>7</sub><sup>3-</sup></span>	Correct	C. <span style="color: #404040">H<sub>2</sub>P<sub>2</sub>O<sub>7</sub><sup>2-</sup></span>	Incorrect	D. <span style="color: #202060">H<sub>3</sub>P<sub>2</sub>O<sub>7</sub><sup>-</sup></span>	Incorrect	E. <span style="color: #00008B">H<sub>4</sub>P<sub>2</sub>O<sub>7</sub></span>	Incorrect
MC	<p>688f_8632</p> <p><strong>Ethylenediaminetetraacetic acid</strong> and its conjugate base, EDTA, is commonly used in chelation therapy and as a chelating agent in biochemical experiments..</p> <p>Ethylenediaminetetraacetic acid is tetraprotic with pK<sub>a</sub> values of <strong>2.00</strong>, <strong>2.67</strong>, <strong>6.16</strong>, and <strong>10.26</strong>.</p> <p>Ethylenediaminetetraacetic acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 11.5</strong>?</p>	A. <span style="color: #00008B">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>6</sub>N<sub>2</sub>O<sub>8</sub></span>	Incorrect	B. <span style="color: #202060">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>5</sub>N<sub>2</sub>O<sub>8</sub><sup>-</sup></span>	Incorrect	C. <span style="color: #404040">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>4</sub>N<sub>2</sub>O<sub>8</sub><sup>2-</sup></span>	Incorrect	D. <span style="color: #602020">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>3</sub>N<sub>2</sub>O<sub>8</sub><sup>3-</sup></span>	Incorrect	E. <span style="color: #8B0000">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>2</sub>N<sub>2</sub>O<sub>8</sub><sup>4-</sup></span>	Correct
MC	<p>688f_f89e</p> <p><strong>Ethylenediaminetetraacetic acid</strong> and its conjugate base, EDTA, is commonly used in chelation therapy and as a chelating agent in biochemical experiments..</p> <p>Ethylenediaminetetraacetic acid is tetraprotic with pK<sub>a</sub> values of <strong>2.00</strong>, <strong>2.67</strong>, <strong>6.16</strong>, and <strong>10.26</strong>.</p> <p>Ethylenediaminetetraacetic acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 11.5</strong>?</p>	A. <span style="color: #8B0000">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>2</sub>N<sub>2</sub>O<sub>8</sub><sup>4-</sup></span>	Correct	B. <span style="color: #602020">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>3</sub>N<sub>2</sub>O<sub>8</sub><sup>3-</sup></span>	Incorrect	C. <span style="color: #404040">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>4</sub>N<sub>2</sub>O<sub>8</sub><sup>2-</sup></span>	Incorrect	D. <span style="color: #202060">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>5</sub>N<sub>2</sub>O<sub>8</sub><sup>-</sup></span>	Incorrect	E. <span style="color: #00008B">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>6</sub>N<sub>2</sub>O<sub>8</sub></span>	Incorrect
MC	<p>7015_88f0</p> <p><strong>Pyrophosphoric acid</strong> and its conjugate base, pyrophosphate, is abbreviated PP<sub>i</sub> and is formed by cells from the hydrolysis of ATP into AMP.</p> <p>Pyrophosphoric acid is tetraprotic with pK<sub>a</sub> values of <strong>0.91</strong>, <strong>2.10</strong>, <strong>6.70</strong>, and <strong>9.32</strong>.</p> <p>Pyrophosphoric acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 4.5</strong>?</p>	A. <span style="color: #00008B">H<sub>4</sub>P<sub>2</sub>O<sub>7</sub></span>	Incorrect	B. <span style="color: #202060">H<sub>3</sub>P<sub>2</sub>O<sub>7</sub><sup>-</sup></span>	Incorrect	C. <span style="color: #404040">H<sub>2</sub>P<sub>2</sub>O<sub>7</sub><sup>2-</sup></span>	Correct	D. <span style="color: #602020">HP<sub>2</sub>O<sub>7</sub><sup>3-</sup></span>	Incorrect	E. <span style="color: #8B0000">P<sub>2</sub>O<sub>7</sub><sup>4-</sup></span>	Incorrect
MC	<p>7015_f577</p> <p><strong>Pyrophosphoric acid</strong> and its conjugate base, pyrophosphate, is abbreviated PP<sub>i</sub> and is formed by cells from the hydrolysis of ATP into AMP.</p> <p>Pyrophosphoric acid is tetraprotic with pK<sub>a</sub> values of <strong>0.91</strong>, <strong>2.10</strong>, <strong>6.70</strong>, and <strong>9.32</strong>.</p> <p>Pyrophosphoric acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 4.5</strong>?</p>	A. <span style="color: #8B0000">P<sub>2</sub>O<sub>7</sub><sup>4-</sup></span>	Incorrect	B. <span style="color: #602020">HP<sub>2</sub>O<sub>7</sub><sup>3-</sup></span>	Incorrect	C. <span style="color: #404040">H<sub>2</sub>P<sub>2</sub>O<sub>7</sub><sup>2-</sup></span>	Correct	D. <span style="color: #202060">H<sub>3</sub>P<sub>2</sub>O<sub>7</sub><sup>-</sup></span>	Incorrect	E. <span style="color: #00008B">H<sub>4</sub>P<sub>2</sub>O<sub>7</sub></span>	Incorrect
MC	<p>7067_88f0</p> <p><strong>Pyrophosphoric acid</strong> and its conjugate base, pyrophosphate, is abbreviated PP<sub>i</sub> and is formed by cells from the hydrolysis of ATP into AMP.</p> <p>Pyrophosphoric acid is tetraprotic with pK<sub>a</sub> values of <strong>0.91</strong>, <strong>2.10</strong>, <strong>6.70</strong>, and <strong>9.32</strong>.</p> <p>Pyrophosphoric acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 7.5</strong>?</p>	A. <span style="color: #00008B">H<sub>4</sub>P<sub>2</sub>O<sub>7</sub></span>	Incorrect	B. <span style="color: #202060">H<sub>3</sub>P<sub>2</sub>O<sub>7</sub><sup>-</sup></span>	Incorrect	C. <span style="color: #404040">H<sub>2</sub>P<sub>2</sub>O<sub>7</sub><sup>2-</sup></span>	Incorrect	D. <span style="color: #602020">HP<sub>2</sub>O<sub>7</sub><sup>3-</sup></span>	Correct	E. <span style="color: #8B0000">P<sub>2</sub>O<sub>7</sub><sup>4-</sup></span>	Incorrect
MC	<p>7067_f577</p> <p><strong>Pyrophosphoric acid</strong> and its conjugate base, pyrophosphate, is abbreviated PP<sub>i</sub> and is formed by cells from the hydrolysis of ATP into AMP.</p> <p>Pyrophosphoric acid is tetraprotic with pK<sub>a</sub> values of <strong>0.91</strong>, <strong>2.10</strong>, <strong>6.70</strong>, and <strong>9.32</strong>.</p> <p>Pyrophosphoric acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 7.5</strong>?</p>	A. <span style="color: #8B0000">P<sub>2</sub>O<sub>7</sub><sup>4-</sup></span>	Incorrect	B. <span style="color: #602020">HP<sub>2</sub>O<sub>7</sub><sup>3-</sup></span>	Correct	C. <span style="color: #404040">H<sub>2</sub>P<sub>2</sub>O<sub>7</sub><sup>2-</sup></span>	Incorrect	D. <span style="color: #202060">H<sub>3</sub>P<sub>2</sub>O<sub>7</sub><sup>-</sup></span>	Incorrect	E. <span style="color: #00008B">H<sub>4</sub>P<sub>2</sub>O<sub>7</sub></span>	Incorrect
MC	<p>7083_88f0</p> <p><strong>Pyrophosphoric acid</strong> and its conjugate base, pyrophosphate, is abbreviated PP<sub>i</sub> and is formed by cells from the hydrolysis of ATP into AMP.</p> <p>Pyrophosphoric acid is tetraprotic with pK<sub>a</sub> values of <strong>0.91</strong>, <strong>2.10</strong>, <strong>6.70</strong>, and <strong>9.32</strong>.</p> <p>Pyrophosphoric acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 1.5</strong>?</p>	A. <span style="color: #00008B">H<sub>4</sub>P<sub>2</sub>O<sub>7</sub></span>	Incorrect	B. <span style="color: #202060">H<sub>3</sub>P<sub>2</sub>O<sub>7</sub><sup>-</sup></span>	Correct	C. <span style="color: #404040">H<sub>2</sub>P<sub>2</sub>O<sub>7</sub><sup>2-</sup></span>	Incorrect	D. <span style="color: #602020">HP<sub>2</sub>O<sub>7</sub><sup>3-</sup></span>	Incorrect	E. <span style="color: #8B0000">P<sub>2</sub>O<sub>7</sub><sup>4-</sup></span>	Incorrect
MC	<p>7083_f577</p> <p><strong>Pyrophosphoric acid</strong> and its conjugate base, pyrophosphate, is abbreviated PP<sub>i</sub> and is formed by cells from the hydrolysis of ATP into AMP.</p> <p>Pyrophosphoric acid is tetraprotic with pK<sub>a</sub> values of <strong>0.91</strong>, <strong>2.10</strong>, <strong>6.70</strong>, and <strong>9.32</strong>.</p> <p>Pyrophosphoric acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 1.5</strong>?</p>	A. <span style="color: #8B0000">P<sub>2</sub>O<sub>7</sub><sup>4-</sup></span>	Incorrect	B. <span style="color: #602020">HP<sub>2</sub>O<sub>7</sub><sup>3-</sup></span>	Incorrect	C. <span style="color: #404040">H<sub>2</sub>P<sub>2</sub>O<sub>7</sub><sup>2-</sup></span>	Incorrect	D. <span style="color: #202060">H<sub>3</sub>P<sub>2</sub>O<sub>7</sub><sup>-</sup></span>	Correct	E. <span style="color: #00008B">H<sub>4</sub>P<sub>2</sub>O<sub>7</sub></span>	Incorrect
MC	<p>71dd_88f0</p> <p><strong>Pyrophosphoric acid</strong> and its conjugate base, pyrophosphate, is abbreviated PP<sub>i</sub> and is formed by cells from the hydrolysis of ATP into AMP.</p> <p>Pyrophosphoric acid is tetraprotic with pK<sub>a</sub> values of <strong>0.91</strong>, <strong>2.10</strong>, <strong>6.70</strong>, and <strong>9.32</strong>.</p> <p>Pyrophosphoric acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 8.5</strong>?</p>	A. <span style="color: #00008B">H<sub>4</sub>P<sub>2</sub>O<sub>7</sub></span>	Incorrect	B. <span style="color: #202060">H<sub>3</sub>P<sub>2</sub>O<sub>7</sub><sup>-</sup></span>	Incorrect	C. <span style="color: #404040">H<sub>2</sub>P<sub>2</sub>O<sub>7</sub><sup>2-</sup></span>	Incorrect	D. <span style="color: #602020">HP<sub>2</sub>O<sub>7</sub><sup>3-</sup></span>	Correct	E. <span style="color: #8B0000">P<sub>2</sub>O<sub>7</sub><sup>4-</sup></span>	Incorrect
MC	<p>71dd_f577</p> <p><strong>Pyrophosphoric acid</strong> and its conjugate base, pyrophosphate, is abbreviated PP<sub>i</sub> and is formed by cells from the hydrolysis of ATP into AMP.</p> <p>Pyrophosphoric acid is tetraprotic with pK<sub>a</sub> values of <strong>0.91</strong>, <strong>2.10</strong>, <strong>6.70</strong>, and <strong>9.32</strong>.</p> <p>Pyrophosphoric acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 8.5</strong>?</p>	A. <span style="color: #8B0000">P<sub>2</sub>O<sub>7</sub><sup>4-</sup></span>	Incorrect	B. <span style="color: #602020">HP<sub>2</sub>O<sub>7</sub><sup>3-</sup></span>	Correct	C. <span style="color: #404040">H<sub>2</sub>P<sub>2</sub>O<sub>7</sub><sup>2-</sup></span>	Incorrect	D. <span style="color: #202060">H<sub>3</sub>P<sub>2</sub>O<sub>7</sub><sup>-</sup></span>	Incorrect	E. <span style="color: #00008B">H<sub>4</sub>P<sub>2</sub>O<sub>7</sub></span>	Incorrect
MC	<p>8024_88f0</p> <p><strong>Pyrophosphoric acid</strong> and its conjugate base, pyrophosphate, is abbreviated PP<sub>i</sub> and is formed by cells from the hydrolysis of ATP into AMP.</p> <p>Pyrophosphoric acid is tetraprotic with pK<sub>a</sub> values of <strong>0.91</strong>, <strong>2.10</strong>, <strong>6.70</strong>, and <strong>9.32</strong>.</p> <p>Pyrophosphoric acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 5.5</strong>?</p>	A. <span style="color: #00008B">H<sub>4</sub>P<sub>2</sub>O<sub>7</sub></span>	Incorrect	B. <span style="color: #202060">H<sub>3</sub>P<sub>2</sub>O<sub>7</sub><sup>-</sup></span>	Incorrect	C. <span style="color: #404040">H<sub>2</sub>P<sub>2</sub>O<sub>7</sub><sup>2-</sup></span>	Correct	D. <span style="color: #602020">HP<sub>2</sub>O<sub>7</sub><sup>3-</sup></span>	Incorrect	E. <span style="color: #8B0000">P<sub>2</sub>O<sub>7</sub><sup>4-</sup></span>	Incorrect
MC	<p>8024_f577</p> <p><strong>Pyrophosphoric acid</strong> and its conjugate base, pyrophosphate, is abbreviated PP<sub>i</sub> and is formed by cells from the hydrolysis of ATP into AMP.</p> <p>Pyrophosphoric acid is tetraprotic with pK<sub>a</sub> values of <strong>0.91</strong>, <strong>2.10</strong>, <strong>6.70</strong>, and <strong>9.32</strong>.</p> <p>Pyrophosphoric acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 5.5</strong>?</p>	A. <span style="color: #8B0000">P<sub>2</sub>O<sub>7</sub><sup>4-</sup></span>	Incorrect	B. <span style="color: #602020">HP<sub>2</sub>O<sub>7</sub><sup>3-</sup></span>	Incorrect	C. <span style="color: #404040">H<sub>2</sub>P<sub>2</sub>O<sub>7</sub><sup>2-</sup></span>	Correct	D. <span style="color: #202060">H<sub>3</sub>P<sub>2</sub>O<sub>7</sub><sup>-</sup></span>	Incorrect	E. <span style="color: #00008B">H<sub>4</sub>P<sub>2</sub>O<sub>7</sub></span>	Incorrect
MC	<p>80c0_88f0</p> <p><strong>Pyrophosphoric acid</strong> and its conjugate base, pyrophosphate, is abbreviated PP<sub>i</sub> and is formed by cells from the hydrolysis of ATP into AMP.</p> <p>Pyrophosphoric acid is tetraprotic with pK<sub>a</sub> values of <strong>0.91</strong>, <strong>2.10</strong>, <strong>6.70</strong>, and <strong>9.32</strong>.</p> <p>Pyrophosphoric acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 3.5</strong>?</p>	A. <span style="color: #00008B">H<sub>4</sub>P<sub>2</sub>O<sub>7</sub></span>	Incorrect	B. <span style="color: #202060">H<sub>3</sub>P<sub>2</sub>O<sub>7</sub><sup>-</sup></span>	Incorrect	C. <span style="color: #404040">H<sub>2</sub>P<sub>2</sub>O<sub>7</sub><sup>2-</sup></span>	Correct	D. <span style="color: #602020">HP<sub>2</sub>O<sub>7</sub><sup>3-</sup></span>	Incorrect	E. <span style="color: #8B0000">P<sub>2</sub>O<sub>7</sub><sup>4-</sup></span>	Incorrect
MC	<p>80c0_f577</p> <p><strong>Pyrophosphoric acid</strong> and its conjugate base, pyrophosphate, is abbreviated PP<sub>i</sub> and is formed by cells from the hydrolysis of ATP into AMP.</p> <p>Pyrophosphoric acid is tetraprotic with pK<sub>a</sub> values of <strong>0.91</strong>, <strong>2.10</strong>, <strong>6.70</strong>, and <strong>9.32</strong>.</p> <p>Pyrophosphoric acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 3.5</strong>?</p>	A. <span style="color: #8B0000">P<sub>2</sub>O<sub>7</sub><sup>4-</sup></span>	Incorrect	B. <span style="color: #602020">HP<sub>2</sub>O<sub>7</sub><sup>3-</sup></span>	Incorrect	C. <span style="color: #404040">H<sub>2</sub>P<sub>2</sub>O<sub>7</sub><sup>2-</sup></span>	Correct	D. <span style="color: #202060">H<sub>3</sub>P<sub>2</sub>O<sub>7</sub><sup>-</sup></span>	Incorrect	E. <span style="color: #00008B">H<sub>4</sub>P<sub>2</sub>O<sub>7</sub></span>	Incorrect
MC	<p>a836_88f0</p> <p><strong>Pyrophosphoric acid</strong> and its conjugate base, pyrophosphate, is abbreviated PP<sub>i</sub> and is formed by cells from the hydrolysis of ATP into AMP.</p> <p>Pyrophosphoric acid is tetraprotic with pK<sub>a</sub> values of <strong>0.91</strong>, <strong>2.10</strong>, <strong>6.70</strong>, and <strong>9.32</strong>.</p> <p>Pyrophosphoric acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 3.0</strong>?</p>	A. <span style="color: #00008B">H<sub>4</sub>P<sub>2</sub>O<sub>7</sub></span>	Incorrect	B. <span style="color: #202060">H<sub>3</sub>P<sub>2</sub>O<sub>7</sub><sup>-</sup></span>	Incorrect	C. <span style="color: #404040">H<sub>2</sub>P<sub>2</sub>O<sub>7</sub><sup>2-</sup></span>	Correct	D. <span style="color: #602020">HP<sub>2</sub>O<sub>7</sub><sup>3-</sup></span>	Incorrect	E. <span style="color: #8B0000">P<sub>2</sub>O<sub>7</sub><sup>4-</sup></span>	Incorrect
MC	<p>a836_f577</p> <p><strong>Pyrophosphoric acid</strong> and its conjugate base, pyrophosphate, is abbreviated PP<sub>i</sub> and is formed by cells from the hydrolysis of ATP into AMP.</p> <p>Pyrophosphoric acid is tetraprotic with pK<sub>a</sub> values of <strong>0.91</strong>, <strong>2.10</strong>, <strong>6.70</strong>, and <strong>9.32</strong>.</p> <p>Pyrophosphoric acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 3.0</strong>?</p>	A. <span style="color: #8B0000">P<sub>2</sub>O<sub>7</sub><sup>4-</sup></span>	Incorrect	B. <span style="color: #602020">HP<sub>2</sub>O<sub>7</sub><sup>3-</sup></span>	Incorrect	C. <span style="color: #404040">H<sub>2</sub>P<sub>2</sub>O<sub>7</sub><sup>2-</sup></span>	Correct	D. <span style="color: #202060">H<sub>3</sub>P<sub>2</sub>O<sub>7</sub><sup>-</sup></span>	Incorrect	E. <span style="color: #00008B">H<sub>4</sub>P<sub>2</sub>O<sub>7</sub></span>	Incorrect
MC	<p>a8a0_88f0</p> <p><strong>Pyrophosphoric acid</strong> and its conjugate base, pyrophosphate, is abbreviated PP<sub>i</sub> and is formed by cells from the hydrolysis of ATP into AMP.</p> <p>Pyrophosphoric acid is tetraprotic with pK<sub>a</sub> values of <strong>0.91</strong>, <strong>2.10</strong>, <strong>6.70</strong>, and <strong>9.32</strong>.</p> <p>Pyrophosphoric acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 6.0</strong>?</p>	A. <span style="color: #00008B">H<sub>4</sub>P<sub>2</sub>O<sub>7</sub></span>	Incorrect	B. <span style="color: #202060">H<sub>3</sub>P<sub>2</sub>O<sub>7</sub><sup>-</sup></span>	Incorrect	C. <span style="color: #404040">H<sub>2</sub>P<sub>2</sub>O<sub>7</sub><sup>2-</sup></span>	Correct	D. <span style="color: #602020">HP<sub>2</sub>O<sub>7</sub><sup>3-</sup></span>	Incorrect	E. <span style="color: #8B0000">P<sub>2</sub>O<sub>7</sub><sup>4-</sup></span>	Incorrect
MC	<p>a8a0_f577</p> <p><strong>Pyrophosphoric acid</strong> and its conjugate base, pyrophosphate, is abbreviated PP<sub>i</sub> and is formed by cells from the hydrolysis of ATP into AMP.</p> <p>Pyrophosphoric acid is tetraprotic with pK<sub>a</sub> values of <strong>0.91</strong>, <strong>2.10</strong>, <strong>6.70</strong>, and <strong>9.32</strong>.</p> <p>Pyrophosphoric acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 6.0</strong>?</p>	A. <span style="color: #8B0000">P<sub>2</sub>O<sub>7</sub><sup>4-</sup></span>	Incorrect	B. <span style="color: #602020">HP<sub>2</sub>O<sub>7</sub><sup>3-</sup></span>	Incorrect	C. <span style="color: #404040">H<sub>2</sub>P<sub>2</sub>O<sub>7</sub><sup>2-</sup></span>	Correct	D. <span style="color: #202060">H<sub>3</sub>P<sub>2</sub>O<sub>7</sub><sup>-</sup></span>	Incorrect	E. <span style="color: #00008B">H<sub>4</sub>P<sub>2</sub>O<sub>7</sub></span>	Incorrect
MC	<p>a8d2_88f0</p> <p><strong>Pyrophosphoric acid</strong> and its conjugate base, pyrophosphate, is abbreviated PP<sub>i</sub> and is formed by cells from the hydrolysis of ATP into AMP.</p> <p>Pyrophosphoric acid is tetraprotic with pK<sub>a</sub> values of <strong>0.91</strong>, <strong>2.10</strong>, <strong>6.70</strong>, and <strong>9.32</strong>.</p> <p>Pyrophosphoric acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 5.0</strong>?</p>	A. <span style="color: #00008B">H<sub>4</sub>P<sub>2</sub>O<sub>7</sub></span>	Incorrect	B. <span style="color: #202060">H<sub>3</sub>P<sub>2</sub>O<sub>7</sub><sup>-</sup></span>	Incorrect	C. <span style="color: #404040">H<sub>2</sub>P<sub>2</sub>O<sub>7</sub><sup>2-</sup></span>	Correct	D. <span style="color: #602020">HP<sub>2</sub>O<sub>7</sub><sup>3-</sup></span>	Incorrect	E. <span style="color: #8B0000">P<sub>2</sub>O<sub>7</sub><sup>4-</sup></span>	Incorrect
MC	<p>a8d2_f577</p> <p><strong>Pyrophosphoric acid</strong> and its conjugate base, pyrophosphate, is abbreviated PP<sub>i</sub> and is formed by cells from the hydrolysis of ATP into AMP.</p> <p>Pyrophosphoric acid is tetraprotic with pK<sub>a</sub> values of <strong>0.91</strong>, <strong>2.10</strong>, <strong>6.70</strong>, and <strong>9.32</strong>.</p> <p>Pyrophosphoric acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 5.0</strong>?</p>	A. <span style="color: #8B0000">P<sub>2</sub>O<sub>7</sub><sup>4-</sup></span>	Incorrect	B. <span style="color: #602020">HP<sub>2</sub>O<sub>7</sub><sup>3-</sup></span>	Incorrect	C. <span style="color: #404040">H<sub>2</sub>P<sub>2</sub>O<sub>7</sub><sup>2-</sup></span>	Correct	D. <span style="color: #202060">H<sub>3</sub>P<sub>2</sub>O<sub>7</sub><sup>-</sup></span>	Incorrect	E. <span style="color: #00008B">H<sub>4</sub>P<sub>2</sub>O<sub>7</sub></span>	Incorrect
MC	<p>c22d_8632</p> <p><strong>Ethylenediaminetetraacetic acid</strong> and its conjugate base, EDTA, is commonly used in chelation therapy and as a chelating agent in biochemical experiments..</p> <p>Ethylenediaminetetraacetic acid is tetraprotic with pK<sub>a</sub> values of <strong>2.00</strong>, <strong>2.67</strong>, <strong>6.16</strong>, and <strong>10.26</strong>.</p> <p>Ethylenediaminetetraacetic acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 7.0</strong>?</p>	A. <span style="color: #00008B">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>6</sub>N<sub>2</sub>O<sub>8</sub></span>	Incorrect	B. <span style="color: #202060">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>5</sub>N<sub>2</sub>O<sub>8</sub><sup>-</sup></span>	Incorrect	C. <span style="color: #404040">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>4</sub>N<sub>2</sub>O<sub>8</sub><sup>2-</sup></span>	Incorrect	D. <span style="color: #602020">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>3</sub>N<sub>2</sub>O<sub>8</sub><sup>3-</sup></span>	Correct	E. <span style="color: #8B0000">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>2</sub>N<sub>2</sub>O<sub>8</sub><sup>4-</sup></span>	Incorrect
MC	<p>c22d_f89e</p> <p><strong>Ethylenediaminetetraacetic acid</strong> and its conjugate base, EDTA, is commonly used in chelation therapy and as a chelating agent in biochemical experiments..</p> <p>Ethylenediaminetetraacetic acid is tetraprotic with pK<sub>a</sub> values of <strong>2.00</strong>, <strong>2.67</strong>, <strong>6.16</strong>, and <strong>10.26</strong>.</p> <p>Ethylenediaminetetraacetic acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 7.0</strong>?</p>	A. <span style="color: #8B0000">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>2</sub>N<sub>2</sub>O<sub>8</sub><sup>4-</sup></span>	Incorrect	B. <span style="color: #602020">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>3</sub>N<sub>2</sub>O<sub>8</sub><sup>3-</sup></span>	Correct	C. <span style="color: #404040">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>4</sub>N<sub>2</sub>O<sub>8</sub><sup>2-</sup></span>	Incorrect	D. <span style="color: #202060">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>5</sub>N<sub>2</sub>O<sub>8</sub><sup>-</sup></span>	Incorrect	E. <span style="color: #00008B">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>6</sub>N<sub>2</sub>O<sub>8</sub></span>	Incorrect
MC	<p>c25f_8632</p> <p><strong>Ethylenediaminetetraacetic acid</strong> and its conjugate base, EDTA, is commonly used in chelation therapy and as a chelating agent in biochemical experiments..</p> <p>Ethylenediaminetetraacetic acid is tetraprotic with pK<sub>a</sub> values of <strong>2.00</strong>, <strong>2.67</strong>, <strong>6.16</strong>, and <strong>10.26</strong>.</p> <p>Ethylenediaminetetraacetic acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 4.0</strong>?</p>	A. <span style="color: #00008B">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>6</sub>N<sub>2</sub>O<sub>8</sub></span>	Incorrect	B. <span style="color: #202060">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>5</sub>N<sub>2</sub>O<sub>8</sub><sup>-</sup></span>	Incorrect	C. <span style="color: #404040">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>4</sub>N<sub>2</sub>O<sub>8</sub><sup>2-</sup></span>	Correct	D. <span style="color: #602020">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>3</sub>N<sub>2</sub>O<sub>8</sub><sup>3-</sup></span>	Incorrect	E. <span style="color: #8B0000">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>2</sub>N<sub>2</sub>O<sub>8</sub><sup>4-</sup></span>	Incorrect
MC	<p>c25f_f89e</p> <p><strong>Ethylenediaminetetraacetic acid</strong> and its conjugate base, EDTA, is commonly used in chelation therapy and as a chelating agent in biochemical experiments..</p> <p>Ethylenediaminetetraacetic acid is tetraprotic with pK<sub>a</sub> values of <strong>2.00</strong>, <strong>2.67</strong>, <strong>6.16</strong>, and <strong>10.26</strong>.</p> <p>Ethylenediaminetetraacetic acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 4.0</strong>?</p>	A. <span style="color: #8B0000">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>2</sub>N<sub>2</sub>O<sub>8</sub><sup>4-</sup></span>	Incorrect	B. <span style="color: #602020">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>3</sub>N<sub>2</sub>O<sub>8</sub><sup>3-</sup></span>	Incorrect	C. <span style="color: #404040">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>4</sub>N<sub>2</sub>O<sub>8</sub><sup>2-</sup></span>	Correct	D. <span style="color: #202060">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>5</sub>N<sub>2</sub>O<sub>8</sub><sup>-</sup></span>	Incorrect	E. <span style="color: #00008B">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>6</sub>N<sub>2</sub>O<sub>8</sub></span>	Incorrect
MC	<p>c2c9_8632</p> <p><strong>Ethylenediaminetetraacetic acid</strong> and its conjugate base, EDTA, is commonly used in chelation therapy and as a chelating agent in biochemical experiments..</p> <p>Ethylenediaminetetraacetic acid is tetraprotic with pK<sub>a</sub> values of <strong>2.00</strong>, <strong>2.67</strong>, <strong>6.16</strong>, and <strong>10.26</strong>.</p> <p>Ethylenediaminetetraacetic acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 1.0</strong>?</p>	A. <span style="color: #00008B">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>6</sub>N<sub>2</sub>O<sub>8</sub></span>	Correct	B. <span style="color: #202060">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>5</sub>N<sub>2</sub>O<sub>8</sub><sup>-</sup></span>	Incorrect	C. <span style="color: #404040">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>4</sub>N<sub>2</sub>O<sub>8</sub><sup>2-</sup></span>	Incorrect	D. <span style="color: #602020">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>3</sub>N<sub>2</sub>O<sub>8</sub><sup>3-</sup></span>	Incorrect	E. <span style="color: #8B0000">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>2</sub>N<sub>2</sub>O<sub>8</sub><sup>4-</sup></span>	Incorrect
MC	<p>c2c9_f89e</p> <p><strong>Ethylenediaminetetraacetic acid</strong> and its conjugate base, EDTA, is commonly used in chelation therapy and as a chelating agent in biochemical experiments..</p> <p>Ethylenediaminetetraacetic acid is tetraprotic with pK<sub>a</sub> values of <strong>2.00</strong>, <strong>2.67</strong>, <strong>6.16</strong>, and <strong>10.26</strong>.</p> <p>Ethylenediaminetetraacetic acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 1.0</strong>?</p>	A. <span style="color: #8B0000">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>2</sub>N<sub>2</sub>O<sub>8</sub><sup>4-</sup></span>	Incorrect	B. <span style="color: #602020">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>3</sub>N<sub>2</sub>O<sub>8</sub><sup>3-</sup></span>	Incorrect	C. <span style="color: #404040">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>4</sub>N<sub>2</sub>O<sub>8</sub><sup>2-</sup></span>	Incorrect	D. <span style="color: #202060">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>5</sub>N<sub>2</sub>O<sub>8</sub><sup>-</sup></span>	Incorrect	E. <span style="color: #00008B">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>6</sub>N<sub>2</sub>O<sub>8</sub></span>	Correct
MC	<p>c397_8632</p> <p><strong>Ethylenediaminetetraacetic acid</strong> and its conjugate base, EDTA, is commonly used in chelation therapy and as a chelating agent in biochemical experiments..</p> <p>Ethylenediaminetetraacetic acid is tetraprotic with pK<sub>a</sub> values of <strong>2.00</strong>, <strong>2.67</strong>, <strong>6.16</strong>, and <strong>10.26</strong>.</p> <p>Ethylenediaminetetraacetic acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 8.0</strong>?</p>	A. <span style="color: #00008B">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>6</sub>N<sub>2</sub>O<sub>8</sub></span>	Incorrect	B. <span style="color: #202060">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>5</sub>N<sub>2</sub>O<sub>8</sub><sup>-</sup></span>	Incorrect	C. <span style="color: #404040">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>4</sub>N<sub>2</sub>O<sub>8</sub><sup>2-</sup></span>	Incorrect	D. <span style="color: #602020">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>3</sub>N<sub>2</sub>O<sub>8</sub><sup>3-</sup></span>	Correct	E. <span style="color: #8B0000">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>2</sub>N<sub>2</sub>O<sub>8</sub><sup>4-</sup></span>	Incorrect
MC	<p>c397_f89e</p> <p><strong>Ethylenediaminetetraacetic acid</strong> and its conjugate base, EDTA, is commonly used in chelation therapy and as a chelating agent in biochemical experiments..</p> <p>Ethylenediaminetetraacetic acid is tetraprotic with pK<sub>a</sub> values of <strong>2.00</strong>, <strong>2.67</strong>, <strong>6.16</strong>, and <strong>10.26</strong>.</p> <p>Ethylenediaminetetraacetic acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 8.0</strong>?</p>	A. <span style="color: #8B0000">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>2</sub>N<sub>2</sub>O<sub>8</sub><sup>4-</sup></span>	Incorrect	B. <span style="color: #602020">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>3</sub>N<sub>2</sub>O<sub>8</sub><sup>3-</sup></span>	Correct	C. <span style="color: #404040">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>4</sub>N<sub>2</sub>O<sub>8</sub><sup>2-</sup></span>	Incorrect	D. <span style="color: #202060">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>5</sub>N<sub>2</sub>O<sub>8</sub><sup>-</sup></span>	Incorrect	E. <span style="color: #00008B">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>6</sub>N<sub>2</sub>O<sub>8</sub></span>	Incorrect
MC	<p>de8a_88f0</p> <p><strong>Pyrophosphoric acid</strong> and its conjugate base, pyrophosphate, is abbreviated PP<sub>i</sub> and is formed by cells from the hydrolysis of ATP into AMP.</p> <p>Pyrophosphoric acid is tetraprotic with pK<sub>a</sub> values of <strong>0.91</strong>, <strong>2.10</strong>, <strong>6.70</strong>, and <strong>9.32</strong>.</p> <p>Pyrophosphoric acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 11.0</strong>?</p>	A. <span style="color: #00008B">H<sub>4</sub>P<sub>2</sub>O<sub>7</sub></span>	Incorrect	B. <span style="color: #202060">H<sub>3</sub>P<sub>2</sub>O<sub>7</sub><sup>-</sup></span>	Incorrect	C. <span style="color: #404040">H<sub>2</sub>P<sub>2</sub>O<sub>7</sub><sup>2-</sup></span>	Incorrect	D. <span style="color: #602020">HP<sub>2</sub>O<sub>7</sub><sup>3-</sup></span>	Incorrect	E. <span style="color: #8B0000">P<sub>2</sub>O<sub>7</sub><sup>4-</sup></span>	Correct
MC	<p>de8a_f577</p> <p><strong>Pyrophosphoric acid</strong> and its conjugate base, pyrophosphate, is abbreviated PP<sub>i</sub> and is formed by cells from the hydrolysis of ATP into AMP.</p> <p>Pyrophosphoric acid is tetraprotic with pK<sub>a</sub> values of <strong>0.91</strong>, <strong>2.10</strong>, <strong>6.70</strong>, and <strong>9.32</strong>.</p> <p>Pyrophosphoric acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 11.0</strong>?</p>	A. <span style="color: #8B0000">P<sub>2</sub>O<sub>7</sub><sup>4-</sup></span>	Correct	B. <span style="color: #602020">HP<sub>2</sub>O<sub>7</sub><sup>3-</sup></span>	Incorrect	C. <span style="color: #404040">H<sub>2</sub>P<sub>2</sub>O<sub>7</sub><sup>2-</sup></span>	Incorrect	D. <span style="color: #202060">H<sub>3</sub>P<sub>2</sub>O<sub>7</sub><sup>-</sup></span>	Incorrect	E. <span style="color: #00008B">H<sub>4</sub>P<sub>2</sub>O<sub>7</sub></span>	Incorrect
MC	<p>eaa9_8632</p> <p><strong>Ethylenediaminetetraacetic acid</strong> and its conjugate base, EDTA, is commonly used in chelation therapy and as a chelating agent in biochemical experiments..</p> <p>Ethylenediaminetetraacetic acid is tetraprotic with pK<sub>a</sub> values of <strong>2.00</strong>, <strong>2.67</strong>, <strong>6.16</strong>, and <strong>10.26</strong>.</p> <p>Ethylenediaminetetraacetic acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 4.5</strong>?</p>	A. <span style="color: #00008B">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>6</sub>N<sub>2</sub>O<sub>8</sub></span>	Incorrect	B. <span style="color: #202060">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>5</sub>N<sub>2</sub>O<sub>8</sub><sup>-</sup></span>	Incorrect	C. <span style="color: #404040">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>4</sub>N<sub>2</sub>O<sub>8</sub><sup>2-</sup></span>	Correct	D. <span style="color: #602020">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>3</sub>N<sub>2</sub>O<sub>8</sub><sup>3-</sup></span>	Incorrect	E. <span style="color: #8B0000">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>2</sub>N<sub>2</sub>O<sub>8</sub><sup>4-</sup></span>	Incorrect
MC	<p>eaa9_f89e</p> <p><strong>Ethylenediaminetetraacetic acid</strong> and its conjugate base, EDTA, is commonly used in chelation therapy and as a chelating agent in biochemical experiments..</p> <p>Ethylenediaminetetraacetic acid is tetraprotic with pK<sub>a</sub> values of <strong>2.00</strong>, <strong>2.67</strong>, <strong>6.16</strong>, and <strong>10.26</strong>.</p> <p>Ethylenediaminetetraacetic acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 4.5</strong>?</p>	A. <span style="color: #8B0000">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>2</sub>N<sub>2</sub>O<sub>8</sub><sup>4-</sup></span>	Incorrect	B. <span style="color: #602020">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>3</sub>N<sub>2</sub>O<sub>8</sub><sup>3-</sup></span>	Incorrect	C. <span style="color: #404040">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>4</sub>N<sub>2</sub>O<sub>8</sub><sup>2-</sup></span>	Correct	D. <span style="color: #202060">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>5</sub>N<sub>2</sub>O<sub>8</sub><sup>-</sup></span>	Incorrect	E. <span style="color: #00008B">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>6</sub>N<sub>2</sub>O<sub>8</sub></span>	Incorrect
MC	<p>eadb_8632</p> <p><strong>Ethylenediaminetetraacetic acid</strong> and its conjugate base, EDTA, is commonly used in chelation therapy and as a chelating agent in biochemical experiments..</p> <p>Ethylenediaminetetraacetic acid is tetraprotic with pK<sub>a</sub> values of <strong>2.00</strong>, <strong>2.67</strong>, <strong>6.16</strong>, and <strong>10.26</strong>.</p> <p>Ethylenediaminetetraacetic acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 7.5</strong>?</p>	A. <span style="color: #00008B">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>6</sub>N<sub>2</sub>O<sub>8</sub></span>	Incorrect	B. <span style="color: #202060">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>5</sub>N<sub>2</sub>O<sub>8</sub><sup>-</sup></span>	Incorrect	C. <span style="color: #404040">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>4</sub>N<sub>2</sub>O<sub>8</sub><sup>2-</sup></span>	Incorrect	D. <span style="color: #602020">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>3</sub>N<sub>2</sub>O<sub>8</sub><sup>3-</sup></span>	Correct	E. <span style="color: #8B0000">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>2</sub>N<sub>2</sub>O<sub>8</sub><sup>4-</sup></span>	Incorrect
MC	<p>eadb_f89e</p> <p><strong>Ethylenediaminetetraacetic acid</strong> and its conjugate base, EDTA, is commonly used in chelation therapy and as a chelating agent in biochemical experiments..</p> <p>Ethylenediaminetetraacetic acid is tetraprotic with pK<sub>a</sub> values of <strong>2.00</strong>, <strong>2.67</strong>, <strong>6.16</strong>, and <strong>10.26</strong>.</p> <p>Ethylenediaminetetraacetic acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 7.5</strong>?</p>	A. <span style="color: #8B0000">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>2</sub>N<sub>2</sub>O<sub>8</sub><sup>4-</sup></span>	Incorrect	B. <span style="color: #602020">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>3</sub>N<sub>2</sub>O<sub>8</sub><sup>3-</sup></span>	Correct	C. <span style="color: #404040">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>4</sub>N<sub>2</sub>O<sub>8</sub><sup>2-</sup></span>	Incorrect	D. <span style="color: #202060">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>5</sub>N<sub>2</sub>O<sub>8</sub><sup>-</sup></span>	Incorrect	E. <span style="color: #00008B">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>6</sub>N<sub>2</sub>O<sub>8</sub></span>	Incorrect
MC	<p>eb61_8632</p> <p><strong>Ethylenediaminetetraacetic acid</strong> and its conjugate base, EDTA, is commonly used in chelation therapy and as a chelating agent in biochemical experiments..</p> <p>Ethylenediaminetetraacetic acid is tetraprotic with pK<sub>a</sub> values of <strong>2.00</strong>, <strong>2.67</strong>, <strong>6.16</strong>, and <strong>10.26</strong>.</p> <p>Ethylenediaminetetraacetic acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 8.5</strong>?</p>	A. <span style="color: #00008B">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>6</sub>N<sub>2</sub>O<sub>8</sub></span>	Incorrect	B. <span style="color: #202060">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>5</sub>N<sub>2</sub>O<sub>8</sub><sup>-</sup></span>	Incorrect	C. <span style="color: #404040">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>4</sub>N<sub>2</sub>O<sub>8</sub><sup>2-</sup></span>	Incorrect	D. <span style="color: #602020">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>3</sub>N<sub>2</sub>O<sub>8</sub><sup>3-</sup></span>	Correct	E. <span style="color: #8B0000">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>2</sub>N<sub>2</sub>O<sub>8</sub><sup>4-</sup></span>	Incorrect
MC	<p>eb61_f89e</p> <p><strong>Ethylenediaminetetraacetic acid</strong> and its conjugate base, EDTA, is commonly used in chelation therapy and as a chelating agent in biochemical experiments..</p> <p>Ethylenediaminetetraacetic acid is tetraprotic with pK<sub>a</sub> values of <strong>2.00</strong>, <strong>2.67</strong>, <strong>6.16</strong>, and <strong>10.26</strong>.</p> <p>Ethylenediaminetetraacetic acid has five possible protonation states in the choices below.</p> <p>Which one of the following protonation states is the most abundant at <strong>pH 8.5</strong>?</p>	A. <span style="color: #8B0000">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>2</sub>N<sub>2</sub>O<sub>8</sub><sup>4-</sup></span>	Incorrect	B. <span style="color: #602020">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>3</sub>N<sub>2</sub>O<sub>8</sub><sup>3-</sup></span>	Correct	C. <span style="color: #404040">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>4</sub>N<sub>2</sub>O<sub>8</sub><sup>2-</sup></span>	Incorrect	D. <span style="color: #202060">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>5</sub>N<sub>2</sub>O<sub>8</sub><sup>-</sup></span>	Incorrect	E. <span style="color: #00008B">C<sub>1</sub><sub>0</sub>H<sub>1</sub><sub>6</sub>N<sub>2</sub>O<sub>8</sub></span>	Incorrect