A solution contains 0.50 M NH₃(aq) and 0.50 M NH₄Cl(aq)

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

Problem

A solution contains 0.50 M NH₃(aq) and 0.50 M NH₄Cl(aq). A few drops of 0.10 M HCl(aq) are introduced. Which net ionic equation best represents the reaction that minimizes the change in pH? (a) NH3(aq)+H2O(l)→NH4+(aq)+OH−(aq)\mathrm{NH_3(aq)+H_2O(l)\rightarrow NH_4^+(aq)+OH^-(aq)} (b) NH3(aq)+H+(aq)→NH4+(aq)\mathrm{NH_3(aq)+H^+(aq)\rightarrow NH_4^+(aq)} (c) NH4+(aq)+OH−(aq)→NH3(aq)+H2O(l)\mathrm{NH_4^+(aq)+OH^-(aq)\rightarrow NH_3(aq)+H_2O(l)} (d) NH3(aq)+Cl−(aq)→NH4Cl(aq)\mathrm{NH_3(aq)+Cl^-(aq)\rightarrow NH_4Cl(aq)}

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