What will be the pH of an aqueous solution of | vedclass

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(C) Ammonium formate is a salt of a weak acid (formic acid) and a weak base (ammonium hydroxide). The $pH$ of a salt of a weak acid and a weak base is

Vedclass · Accepted Answer

$6.5$

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(C) Ammonium formate is a salt of a weak acid (formic acid) and a weak base (ammonium hydroxide). The $pH$ of a salt of a weak acid and a weak base is given by the formula: $pH = 7 + \frac{1}{2}(pK_a - pK_b)$ Substituting the given values: $pH = 7 + \frac{1}{2}(3.8 - 4.8)$ $pH = 7 + \frac{1}{2}(-1.0)$ $pH = 7 - 0.5 = 6.5$

What will be the $pH$ of an aqueous solution of $1.0 \ M$ ammonium formate? (Given: $pK_a = 3.8$ and $pK_b = 4.8$)

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