An aqueous solution of an acid (0.20 mol dm-3) is added slowly from a burette to 20 cm3 of an aqueous base (0.20 mol dm-3). Which acid–base combination will produce a mixture with the highest pH at the equivalence point at 298 K?
Hydrochloric acid and methylamine
Propanoic acid and sodium hydroxide
Nitric acid and potassium hydroxide
Ethanoic acid and ammonia
