Equilibrium Question 309

Question: If solubility product of $ HgSO_4 $ is $ 6.4\times {10^{-5}} $ , then its solubility is [BHU 2004]

Options:

A) $ 8\times {10^{-3}}mole/litre $

B) $ 6.4\times {10^{-5}}mole/litre $

C) $ 6.4\times {10^{-3}}mole/litre $

D) $ 2.8\times {10^{-6}}mole/litre $

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Answer:

Correct Answer: A

Solution:

$ HgSO_4\ \to \ \underset{x,}{\mathop{H{g^{++}}}},+\underset{x}{\mathop{SO_4^{–}}}, $

$ K _{sp}=x^{2} $ ; $ x=\sqrt{K _{sp}} $ ; $ x=\sqrt{6.4\times {10^{-5}}} $

$ x=8\times {10^{-3}} $ mole/litre.



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