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Q.

Calomel is mercurous chloride which exist as a dimer. If its molar solubility in water is 10-2M then its solubility product will be

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a

8 × 10–6

b

 4 × 10–4   

c

4 × 10–6    

d

4 × 10–8    

answer is A.

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Detailed Solution

 

Hg₂Cl₂(s) ⇌ Hg₂Cl₂(aq) → Hg₂²⁺(aq) + 2 Cl⁻(aq)
[Hg₂²⁺] = 10⁻², [Cl⁻] = 2×10⁻²

Ksp=(102)×(2×102)2=4×106K_{sp} = (10^{-2}) \times (2\times10^{-2})^{2} = 4\times10^{-6}.

 

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