Chemistry

Problem

When acetic acid

\mathrm{CH_3COOH}

donates a proton to the hydrosulfide ion

\mathrm{HS^-}

in aqueous solution, which net ionic equation is correct? a)

\mathrm{CH_3COOH(aq) + H_2S(aq) \rightleftharpoons CH_3COO^-(aq) + HS^-(aq)}

\mathrm{CH_3COO^-(aq) + HS^-(aq) \rightleftharpoons CH_3COOH(aq) + S^{2-}(aq)}

\mathrm{CH_3COOH(aq) + HS^-(aq) \rightleftharpoons CH_3COO^-(aq) + H_2S(aq)}

\mathrm{CH_3COOH(aq) + HS^-(aq) \rightleftharpoons CH_3COO^-(aq) + H^+(aq) + S^{2-}(aq)}