Buffer solution

A buffer solution is a solution where the pH does not change significantly on dilution or if a small amount of strong acid or base is added to it at constant temperature. Buffer capacity is used to measure the resistance to pH change of a buffer solution.

Buffer solutions are used as a means of keeping pH at a nearly constant value in a wide variety of chemical applications. In nature, there are many living systems that use buffering for pH regulation. For example, the bicarbonate buffering system is used to regulate the pH of blood, and bicarbonate also acts as a buffer in the ocean.

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