Acetic acid, [tex]$CH_3COOH$[/tex], is a weak acid. What is the reaction of acetic acid in water?

A. [tex]$CH_3COOH (aq) + H_2O (l) \rightleftharpoons H_3O^+ (aq) + CH_3COO^- (aq)$[/tex]

B. [tex][tex]$CH_3COOH (aq) + H_2O (l) \rightarrow H_3O^+ (aq) + CH_3COO^- (aq)$[/tex][/tex]

C. [tex]$CH_3COOH (aq) + H_3O^+ (aq) \rightleftharpoons H_2O (l) + CH_3COO^- (aq) + H^+ (aq)$[/tex]

D. [tex]$CH_3COOH (aq) + OH^- (aq) \rightarrow H_2O (l) + CH_3COO^- (aq)$[/tex]

Question

22-07-2024
Chemistry

Answered

Acetic acid, [tex]$CH_3COOH$[/tex], is a weak acid. What is the reaction of acetic acid in water?

A. [tex]$CH_3COOH (aq) + H_2O (l) \rightleftharpoons H_3O^+ (aq) + CH_3COO^- (aq)$[/tex]

B. [tex][tex]$CH_3COOH (aq) + H_2O (l) \rightarrow H_3O^+ (aq) + CH_3COO^- (aq)$[/tex][/tex]

C. [tex]$CH_3COOH (aq) + H_3O^+ (aq) \rightleftharpoons H_2O (l) + CH_3COO^- (aq) + H^+ (aq)$[/tex]

D. [tex]$CH_3COOH (aq) + OH^- (aq) \rightarrow H_2O (l) + CH_3COO^- (aq)$[/tex]

Answer :

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GinnyAnswer GinnyAnswer · Answer 1 · 2024-07-22T11:05:59-04:00

When acetic acid [tex]$(CH_3COOH)$[/tex] dissolves in water, it partially dissociates into its ions. The correct representation of this equilibrium reaction is:

[tex]\[ CH_3COOH (aq) + H_2O (l) \rightleftharpoons H_3O^+ (aq) + CH_3COO^- (aq) \][/tex]

This equation shows that acetic acid donates a proton [tex]$(H^+)$[/tex] to a water molecule, forming hydronium ion [tex]$(H_3O^+)$[/tex] and acetate ion [tex]$(CH_3COO^-)$[/tex]. This reaction is reversible and establishes an equilibrium between the reactants and the products in aqueous solution. Therefore, the first option is the correct one.