How does a buffer help a solution maintain pH?

Question

Quizplus · Accepted Answer

A buffer can act like a base if the pH is too acidic and can act like an acid if the pH is too basic. This means that a buffer can accept or donate protons (H+) to maintain a relatively constant pH in a solution, even when an acid or base is added. This helps to prevent drastic changes in pH that could be harmful to biological systems or chemical reactions. Choice A and D are incorrect as buffers do not release acid or base, but rather can accept or donate them. Choice B is incorrect as buffers do not form cations and anions, but rather already contain them in equilibrium to act as a pH buffer.

How Does a Buffer Help a Solution Maintain PH