Question

Addition of sodium acetate solution to acetic acid causes the following change-

• A. pH increases
• B. pH decreases
• C. pH remains unchanged
• D. pH becomes 7

Answer 1

Answer: (A)

pH increases

Dissociation of $C{H}_{3}COOH$ is suppressed by the addition of sodium acetate $\left(C{H}_{3}COONa\right)$ due to common ion $\left(C{H}_{3}CO{O}^{-}\right)$ effect. The $\left[H^{+}\right]$ decreases raising the pH of the acid solution.

Hence, pH will increases.

Therefore, option A is correct.