Function by absorbing excess hydrogen or hydroxide ions.

Buffers function by absorbing excess hydrogen or hydroxide ions.

Buffer solution

Explanation:

Buffer is a solution which resists changes in pH when small quantities of acid or alkali are added to it.

It is formed by combination of weak acid and salt of weak acid with strong base called as acidic buffer.Example: and

Or it is formed by combination of weak base and salt of weak base with strong acid called as basic buffer buffer. Example: and

When acid is added to buffer, the buffer releases ions to neutralize the acid added and when base is added to buffer, the buffer releases ions to neutralize the base added.

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