What is a buffer?

Buffers These are solutions that resist changes in pH on addition of small amounts of either the acid or base.

Buffers are usually made of either a mixture of a weak acid and its salt with strong base (e.g. CH₃COOH + CH₃COO^–Na⁺) or a mixture of a weak base and its salt with a strong acid (e.g. NH₃ + NH₄Cl)

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