Question

When $C{H}_{3}COONa$ is added to an aqueous solution of $C{H}_{3}COOH$:

• A. the pH of the solution decreases
• B. the pH of the solution increases
• C. the pH of the solution remains unaltered
• D. an acidic salt is produced

Answer 1

Answer: (B)

the pH of the solution increases

$C{H}_{3}COOH\leftrightharpoons C{H}_{3}CO{O}^{-}+H^{+}$

If $C{H}_{3}COONa$ is added, equilibrium will shift backward due to the common ion effect. $H^{+}$ will decrease.

$\therefore$ pH will increase.