A buffer solution helps stabilize pH by containing a weak acid and its conjugate base, or a weak base and its conjugate acid. It minimizes pH changes when strong acids or bases are added. Examples include solutions like acetic acid and sodium acetate.
A buffer solution is an aqueous solution consisting of a mixture of a weak acid and its conjugate base, or vice versa. Its pH changes very little when a small or moderate amount of strong acid or base is added to it, and thus it is used to prevent changes in the pH of a solution. For example, a buffer may contain dissolved HC2H3O2 (a weak acid) and NaC2H3O2 (the salt derived from that weak acid).
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