MCQ
The $pH $ of a $0.01\,M$ solution of acetic acid having degree of dissociation $12.5\%$ is
- A$5.623$
- ✓$2.903$
- C$3.723$
- D$4.509$
✓
Answer
Correct option: B.
$2.903$
(b) $[{H^ + }] = C\alpha = 0.01 \times \frac{{1.25}}{{100}}$
${H^ + } = 1.25 \times {10^{ - 3}}$; $pH = {\text{between}}\,\,\,{\text{2}}\,\,{\text{or}}\,\,{\text{3}} = {\text{2}}{\text{.90}}$
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