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(A) Acetic acid $(CH_3COOH)$ is a weak acid that dissociates as: $CH_3COOH \rightleftharpoons CH_3COO^- + H^+$.According to Le Chatelier's principle,a

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$CH_3COONa$

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(A) Acetic acid $(CH_3COOH)$ is a weak acid that dissociates as: $CH_3COOH \rightleftharpoons CH_3COO^- + H^+$.According to Le Chatelier's principle,adding a common ion like acetate $(CH_3COO^-)$ from a salt such as sodium acetate $(CH_3COONa)$ shifts the equilibrium to the left.This process,known as the common ion effect,suppresses the dissociation of the weak acid,thereby decreasing the concentration of $H^+$ ions.

Which of the following,when added to a solution of acetic acid,will decrease the concentration of hydrogen ions?

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