What is the role of a buffer?

A buffer solution is defined as a solution that usually contains on the one hand either a weak acid (as carbonic acid) together with one of the salts of this acid or at least one acid salt of a weak acid or a weak base together with one of the salts of the base and that by its resistance to change in hydrogen ion concentration on the addition of an acid or base is used in many chemical, biological and technical processes.

The ideal buffer solution should be easy to prepare, be stable in storage, be capable of reproduction, have a small dilution factor, and have a low-temperature coefficient. In order to resist changes in pH, blood and other body fluids are naturally buffered. Buffers are of great importance in living systems.

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