The approximate pH of a solution formed by mixing equal volumes o… - Vidyadip

MCQ

The approximate $pH$ of a solution formed by mixing equal volumes of solution of $0.1\,M$ sodium propanoate and $0.1\,M$ propanoic acid (if the dissociation constant of propanoic acid is $1.3\times10^{-5}$) will be

A
$1.52$
B
$3.62$
✓
$4.89$
D
$5.52$

✓

Answer

Correct option: C.

$4.89$

c
$pH = - \log \,Ka + \log \frac{{\left[ {salt} \right]}}{{\left[ {Acid} \right]}}$

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