How does a buffer help a solution maintain pH?

Question

Quizplus · Accepted Answer

A buffer is a solution that can resist changes in pH by absorbing small amounts of acid or base without significantly changing the pH of the solution. Buffers contain both a weak acid and its corresponding conjugate base, or a weak base and its corresponding conjugate acid. When an acid is added to the buffer solution, the weak base in the buffer reacts with the added acid, neutralizing it and maintaining the pH of the solution. Similarly, when a base is added to the buffer solution, the weak acid in the buffer reacts with the added base, neutralizing it and maintaining the pH of the solution. Therefore, a buffer can act like an acid or a base, depending on the needs of the solution.

How Does a Buffer Help a Solution Maintain PH