Equilibrium Question 300

Question: The values of Ksp for CuS,Ag2S and HgS are 1031,,1042 and 1054 respectively. The correct order of their solubility in water is [MP PMT 2003]

Options:

A) Ag2S>HgS>CuS

B) HgS>CuS>Ag2S

C) HgS>Ag2S>CuS

D) Ag2S>CuS>HgS

Show Answer

Answer:

Correct Answer: D

Solution:

Ag2S>CuS>HgS . Solubility of CuS =1031=3.16×1016mol/lit. Solubility of Ag2S

=Ksp43=104243=6.3×105mole/litre Solubility of HgS =Ksp=1054

=1027mol/litre.



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