Which of the following solutions is a buffer? Which of the following solutions is a buffer? a solution of sulfuric acid and sodium sulfate a solution of acetic acid and sodium sulfate a solution of acetic acid and sodium acetate a solution of hydrochloric acid and sodium acetate a solution of hydrochloric acid and sodium sulfate

a solution of acetic acid and sodium acetate

Explanation:

A buffer solution is defined as a solution which resist a change in pH when small quantity of a strong acid or a strong base are added. A buffer solution is made up of mixture of a weak acid and its conjugate base or a mixture of a weak base and its conjugate acid.

Acetic acid is the only option because it is a weak acid with a corresponding conjugate base, acetate. Unlike a solution of sulfuric acid and sodium sulfate in which the sulfuric acid is a strong acid which doesn't qualify it to be a buffer solution. The remaining options have different acid compounds paired together which makes them invalid too.