Aqueous NaOH is slowly added to a solution of HF(aq) until the mixture is just…

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

Problem

Aqueous NaOH is slowly added to a solution of HF(aq) until the mixture is just slightly basic. Which equation best represents the principal net ionic reaction that has occurred? (a) HF(aq)⇌H+(aq)+F−(aq)\text{HF}(aq) \rightleftharpoons \text{H}^+(aq) + \text{F}^-(aq) (b) H+(aq)+OH−(aq)→H2O(l)\text{H}^+(aq) + \text{OH}^-(aq) \rightarrow \text{H}_2\text{O}(l) (c) HF(aq)+OH−(aq)→F−(aq)+H2O(l)\text{HF}(aq) + \text{OH}^-(aq) \rightarrow \text{F}^-(aq) + \text{H}_2\text{O}(l) (d) Na+(aq)+OH−(aq)+HF(aq)→Na+(aq)+F−(aq)+H2O(l)\text{Na}^+(aq) + \text{OH}^-(aq) + \text{HF}(aq) \rightarrow \text{Na}^+(aq) + \text{F}^-(aq) + \text{H}_2\text{O}(l)

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