MCQ
If the dissociation constant of an acid $HA$ is $1 \times {10^{ - 5}},$ the $pH$ of a $ 0.1$ molar solution of the acid will be approximately
- ✓$3$
- B$5$
- C$1$
- D$6$
✓
Answer
Correct option: A.
$3$
(a)$[{H^ + }] = \sqrt {Kc} = \sqrt {{{10}^{ - 5}} \times 0.1} = {10^{ - 3}},\,\,\,pH = 3$.
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