Multiple Choice
Succinic acid (HO2CCH2CH2CO2H) is an intermediate in the Kreb's cycle used to "burn" carbohydrates, proteins and lipids. The formula for succinic acid can be abbreviated as H2Sc.
H2Sc(aq) + H2O(l) ![Succinic acid (HO<sub>2</sub>CCH<sub>2</sub>CH<sub>2</sub>CO<sub>2</sub>H) is an intermediate in the Kreb's cycle used to burn carbohydrates, proteins and lipids. The formula for succinic acid can be abbreviated as H<sub>2</sub>Sc. H<sub>2</sub>Sc(aq) + H<sub>2</sub>O(l) H<sub>3</sub>O<sup>+</sup>(aq) + HSc<sup>-</sup>(aq) K<sub>a1</sub> = 6.9 x 10<sup>-5</sup> HSc<sup>-</sup>(aq) + H<sub>2</sub>O(l) H<sub>3</sub>O<sup>+</sup>(aq) + Sc<sup>2-</sup>(aq) K<sub>a2</sub> = 2.5 x 10<sup>-6</sup> Which of the following assumptions may not be valid for solutions of succinic acid because the difference between K<sub>a1</sub> and K<sub>a2</sub> for H<sub>2</sub>Sc is very small? A) [H<sub>3</sub>O<sup>+</sup>] \approx K<sub>w</sub>/[OH<sup>-</sup>] B) [H<sub>2</sub>Sc] < [Sc<sup>2-</sup>] C) [HSc<sup>-</sup> ] \approx [H<sub>3</sub>O<sup>+</sup>] D) [H<sub>2</sub>Sc] \approx C<sub>H</sub><sub>2</sub><sub>Sc</sub> E) None of these assumptions are legitimate for this solution.](https://d2lvgg3v3hfg70.cloudfront.net/TB9692/11ee9da3_9e05_9592_9ff6_a106ec69e13c_TB9692_11.jpg)
H3O+(aq) + HSc-(aq) Ka1 = 6.9 x 10-5
HSc-(aq) + H2O(l) ![Succinic acid (HO<sub>2</sub>CCH<sub>2</sub>CH<sub>2</sub>CO<sub>2</sub>H) is an intermediate in the Kreb's cycle used to burn carbohydrates, proteins and lipids. The formula for succinic acid can be abbreviated as H<sub>2</sub>Sc. H<sub>2</sub>Sc(aq) + H<sub>2</sub>O(l) H<sub>3</sub>O<sup>+</sup>(aq) + HSc<sup>-</sup>(aq) K<sub>a1</sub> = 6.9 x 10<sup>-5</sup> HSc<sup>-</sup>(aq) + H<sub>2</sub>O(l) H<sub>3</sub>O<sup>+</sup>(aq) + Sc<sup>2-</sup>(aq) K<sub>a2</sub> = 2.5 x 10<sup>-6</sup> Which of the following assumptions may not be valid for solutions of succinic acid because the difference between K<sub>a1</sub> and K<sub>a2</sub> for H<sub>2</sub>Sc is very small? A) [H<sub>3</sub>O<sup>+</sup>] \approx K<sub>w</sub>/[OH<sup>-</sup>] B) [H<sub>2</sub>Sc] < [Sc<sup>2-</sup>] C) [HSc<sup>-</sup> ] \approx [H<sub>3</sub>O<sup>+</sup>] D) [H<sub>2</sub>Sc] \approx C<sub>H</sub><sub>2</sub><sub>Sc</sub> E) None of these assumptions are legitimate for this solution.](https://d2lvgg3v3hfg70.cloudfront.net/TB9692/11ee9da3_9e05_9593_9ff6_d7036d6a617e_TB9692_11.jpg)
H3O+(aq) + Sc2-(aq) Ka2 = 2.5 x 10-6
Which of the following assumptions may not be valid for solutions of succinic acid because the difference between Ka1 and Ka2 for H2Sc is very small?
A) [H3O+] Kw/[OH-]
B) [H2Sc] < [Sc2-]
C) [HSc- ] [H3O+]
D) [H2Sc] CH2Sc
E) None of these assumptions are legitimate for this solution.
Correct Answer:
Verified
Correct Answer:
Verified
Q77: Determine the [OH <sup></sup> ] for
Q78: Use the following acid-dissociation equilibrium constants for
Q79: Which of the following structural factors is
Q80: Arrange the following bases in order of
Q81: Which one of the following mixtures would
Q83: Use the following information to answer <br>H<sub>2</sub>Se:
Q84: What is the pH of a solution
Q85: Which of the following won't produce an
Q86: For H<sub>2</sub>CO<sub>3</sub>, K<sub>a2</sub> = 4.7 x 10<sup>-11</sup>.
Q87: Which of the following compounds cannot be