The addition of hydrofluoric acid and ________ to water produces a buffer solution. A)HCl B)NaNO₃ C)NaCl D)NaOH E)NaBr

Question

Quizplus · Accepted Answer

Hydrofluoric acid (HF) is a weak acid, and when it is added to water, it undergoes partial ionization to form H+ ions and F- ions. This can be represented as: 
HF + H2O ⇌ H3O+ + F- 
The addition of a strong base such as NaOH to this solution will react with the H+ ions to form water and the F- ions will react with the Na+ ions to form NaF. This reaction will help to maintain the pH of the solution at a relatively constant level, creating a buffer solution. Therefore, the correct choice is D) NaOH.

The Addition of Hydrofluoric Acid and ________ to Water Produces