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Q. If $pK_a$ of acetic acid and $pK_b$ of ammonium hydroxide are $4.76$ each. The $pH$ of ammonium acetate is

JIPMERJIPMER 2015Equilibrium

Solution:

pH of a salt of weak acid and weak base is
$pH = 7 +\frac{1}{2}p K_{a}-\frac{1}{2}pK_{b}$
$pH = 7 + \frac{1}{2} \times 4.76 - \frac{1}{2} \times 4.76$