ABC26PH0399 · Electrochemistry

Subject: Physical Chemistry · Chapter: Electrochemistry · Topic: Electrochemistry – General · Exam: GATE 2005-2021 · Marks: 2 · Difficulty: Medium

A sparingly soluble electrolyte $\mathrm{M}_{2} \mathrm{X}$ ionizes as $\mathrm{M}_{2} \mathrm{X} \rightleftharpoons 2 \mathrm{M}^{+}+\mathrm{X}^{2-}$. The solubility product $\left(\mathrm{K}_{\mathrm{sp}}\right)$, molal solubility $(\mathrm{S})$ and molal activity coefficient $\left(\gamma_{ \pm}\right)$are related by
(a)$\mathrm{K}_{\mathrm{SP}}=\mathrm{S}^{2} \gamma_{ \pm}^{2}$
(b)$\mathrm{K}_{\mathrm{SP}}=\mathrm{S}^{3} \gamma_{ \pm}^{3}$
(c)$\mathrm{K}_{\mathrm{SP}}=4 \mathrm{S}^{3} \gamma_{ \pm}^{2}$
(d)$\mathrm{K}_{\mathrm{SP}}=4 \mathrm{S}^{3} \gamma_{ \pm}^{3}$
Answer
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Explanation
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