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(A) Acetic acid $(CH_3COOH)$ is a weak acid that dissociates as: $CH_3COOH \rightleftharpoons CH_3COO^- + H^+$. When $HCl$ (a strong acid) is added,it

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The molar concentration of $CH_3COO^-$ decreases.

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(A) Acetic acid $(CH_3COOH)$ is a weak acid that dissociates as: $CH_3COOH \rightleftharpoons CH_3COO^- + H^+$. When $HCl$ (a strong acid) is added,it provides a high concentration of $H^+$ ions. According to Le Chatelier's principle,the increase in the concentration of $H^+$ ions shifts the equilibrium to the left. This results in the formation of more $CH_3COOH$ and a decrease in the concentration of $CH_3COO^-$ ions due to the common ion effect.

When $0.01 \ M \ HCl$ is added to an aqueous solution of acetic acid,then...

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