A 0.025 M solution of an unknown organic acid has a pH of 3.23. 2.1 By means of a full calculation, determine the value of the ionisation constant of the conjugate base of this acid.. - You may use “HA” to denote the formula of the acid. - You may make certain assumptions to simplify your calculations 2.2 A certain amount of the sodium salt of the conjugate base of the acid was added to the system. Will the pH of the resulting solution increase or decrease, compared to the original given value?

Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter15: Acid–base Equilibria
Section: Chapter Questions
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A 0.025 M solution of an unknown organic acid has a pH of 3.23.

2.1 By means of a full calculation, determine the value of the ionisation constant of the conjugate
base of this acid..
- You may use “HA” to denote the formula of the acid.
- You may make certain assumptions to simplify your calculations

2.2 A certain amount of the sodium salt of the conjugate base of the acid was added to the system.
Will the pH of the resulting solution increase or decrease, compared to the original given value? Explain your answer in a short sentence or two.

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