The addition of hydrofluoric acid and ________ to water produces a buffer solution. A)NaF B)HF C)NaNO₃ D)NaBr E)KI

Question

Quizplus · Accepted Answer

When hydrofluoric acid, HF, is added to water, it partially dissociates to form fluoride ions and hydronium ions. The fluoride ions react with the added sodium fluoride, NaF, to form an equilibrium mixture of HF, F-, and HF2- ions. This mixture acts as a buffer solution, meaning it can resist changes in pH when small amounts of an acid or base are added. Therefore, the best choice is A, NaF.

The Addition of Hydrofluoric Acid and ________ to Water Produces