A buffer solution is a solution that consists of either a weak acid and its conjugate base or a weak base and its conjugate acid. The conjugate acids or bases are typical the respective salts of the weak base or acid. Buffer solutions can resist changes in pH because the weak acid or base and conjugate salt parings allow for the solution to neutralize any changes within a specific range that varies between specific buffers. If the pH is changed dramatically, a buffer solution may begin to fail to stabilize the pH level.
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