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(a) Define buffer solution. 

(b) Give one example each of acidic and basic buffer.

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(a) The solution which resists change in pH on dilution or with the addition of small amounts of acid or alkali is called buffer solution.

(b) Example of acidic buffer-

CH3COOH + CH3COONa (pH = 4.75)

Example of basic buffer- 

NH4OH + NH4Cl (pH = 9.25)

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