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For an individual weak acid or weak base component, see Buffering agent. For uses not related to acid-base chemistry, see Buffer (disambiguation). A buffer solution (more precisely, pH buffer or hydrogen ion buffer) is an aqueous solution consisting of a mixture of a weak acid and its conjugate base, or vice versa.or an individual weak acid or weak base component, see Buffering agent. For uses not related to acid-base chemistry, see Buffer (disambiguation). A buffer solution (more precisely, pH buffer or hydrogen ion buffer) is an aqueous solution consisting of a mixture of a weak acid and its conjugate base, or vice versa.
Mixtures of a weak acid and its conjugate base, such as HOAc and the OAc-ion, are called buffers. The term buffer usually means to lessen or absorb shock.. These solutions are buffers because they lessen or absorb the drastic change in pH that occurs when small amounts of acids or bases are added to water.