Ammonia is added to water

CHEMISTRY · Single correct · A Level · Chemistry · Acids and bases · Acids and bases

Problem

Ammonia is added to water. Which equation most correctly depicts the proton-transfer process and the resulting conjugate acid–base pairs? (a) NH3(aq)+H2O(l)⇌NH2−(aq)+H3O+(aq)\mathrm{NH_3(aq) + H_2O(l) \rightleftharpoons NH_2^-(aq) + H_3O^+(aq)} (b) NH3(aq)+H2O(l)⇌NH4+(aq)+OH−(aq)\mathrm{NH_3(aq) + H_2O(l) \rightleftharpoons NH_4^+(aq) + OH^-(aq)} (c) NH3(aq)+H2O(l)⇌NH4OH(aq)\mathrm{NH_3(aq) + H_2O(l) \rightleftharpoons NH_4OH(aq)} (d) NH3(aq)+OH−(aq)⇌NH2−(aq)+H2O(l)\mathrm{NH_3(aq) + OH^-(aq) \rightleftharpoons NH_2^-(aq) + H_2O(l)}

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