07. EQUILIBRIUM (IONIC) (HM)
1 \(0.6 \times {10^{ - 4}}\)
2 \(6 \times {10^{ - 4}}\)
3 \(6 \times {10^{ - 5}}\)
4 \(3.6 \times {10^{ - 4}}\)
Explanation:
(b) प्रारम्भिक सान्द्रता \(= 0.006\, M\) \(==> \) \({K_a} = 6 \times {10^{ - 5}}\)
साम्य अभिक्रिया ,\(\mathop {\mathop {{C_6}{H_5}COOH}\limits_C }\limits_{C(1 - a)\,\,\,} \) \( \rightleftharpoons \) \(\mathop {\mathop {{C_6}{H_5}CO{O^ - }}\limits_O }\limits_{Ca} + \mathop {\mathop {{H^ + }\,\,\,\,\,\,\,}\limits_{O\,\,{\rm{initial}}} }\limits_{Ca\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \)
\({K_a} = C{\alpha ^2}\) \((\because 1 - \alpha \approx 1)\) दुर्बल विधुत अपघट्य के लिए
\(\alpha = \sqrt {\frac{{{K_a}}}{C}} \); \(\alpha = \sqrt {\frac{{6 \times {{10}^{ - 5}}}}{{0.006}}} \); \(\alpha = {10^{ - 1}}\)
\(\because \,[{H^ + }] = C\alpha \)\( = 0.006 \times {10^{ - 1}}\)\( = 6 \times {10^{ - 4}}\,M\).