Introduction to Acids and Bases Practice Test

A student mixes aqueous hydrofluoric acid with water: $\mathrm{HF(aq) + H_2O(l) \rightleftharpoons H_3O^+(aq) + F^-(aq)}$. Which pair represents a conjugate acid–base pair in this reaction?

A student adds hydrogen chloride gas to water, producing the reaction $\mathrm{HCl(g) + H_2O(l) \rightarrow H_3O^+(aq) + Cl^-(aq)}$. Which species is the Brønsted–Lowry base in this reaction?