Select the statements that correctly describe a buffer. a) An acid added to the buffer solution reacts with the weak base of the buffer. b) The pH of a buffer solution is determined by the ratio of the concentration of conjugate base to the concentration of strong acid. c) A buffer is generally made up of a weak acid and its conjugate base. d) The pH of a buffer solution does not change significantly when any amount of a strong acid is added. e) The Ka of a buffer does not change when any amount of an acid is added to the buffer solution.

Question

06-06-2020
Chemistry

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Select the statements that correctly describe a buffer. a) An acid added to the buffer solution reacts with the weak base of the buffer. b) The pH of a buffer solution is determined by the ratio of the concentration of conjugate base to the concentration of strong acid. c) A buffer is generally made up of a weak acid and its conjugate base. d) The pH of a buffer solution does not change significantly when any amount of a strong acid is added. e) The Ka of a buffer does not change when any amount of an acid is added to the buffer solution.

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jamesesther1234 jamesesther1234 · Answer 1 · 2020-06-08T02:18:29+02:00

Answer:

(B.) The pH of a buffer solution is determined by the ratio of the concentration of conjugate base to the concentration of strong acid.
(C.) A buffer is generally made up of a weak acid and its conjugate base.
(D.) The pH of a buffer solution does not change significantly when any amount of a strong acid is added.

Explanation:

A buffer is solution which resists change in pH upon addition of either acids or bases.

The pH of a buffer is calculated by the ratio of the concentration of base to concentration of acid. The weak acid and conjugate base have a Ka similar to the pH desired.

nikitarahangdaleVT nikitarahangdaleVT · Answer 2 · 2022-04-06T11:57:54+02:00

Statements that are correctly describe a buffer are buffer is generally made up of a weak acid and its conjugate base, pH and Ka of a buffer solution does not change significantly.

What is buffer solution?

Buffer solution is a mixture of a weak acid and its conjugate base or weak base with its conjugate acid.

Buffer solutions resists the value of pH of the solution whenever small quantity of strong acid or strong base is added on it. pH of the buffer solution will be calculated by using the Henderson Hasselbalch equation as follow:

For weak acids-

pH = pka + log [conjugate base]/[weak acid]

For weak base-

pH = pka + log [conjugate acid]/[weak base]

Ka is the acid dissociation constant which is not changes too much for the buffer solution.

Hence options (C), (D) and (E) are correct.

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