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  4. A buffer solution can be prepared from a mixture of

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Q. A buffer solution can be prepared from a mixture of

IIT JEEIIT JEE 1999Equilibrium

Solution:

$CH_3COOH + CH_3COONa$ = Buffer solution
$CH_3COONa + HCl \longrightarrow CH_3COOH + NaCl$
If $HCl$ is taken in limited quantity, final solution will have both $CH_3COOH $ and $ CH_3COONa$ needed for buffer solution.
Ammonia and ammonium chloride forms basic buffer