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Question


The ksp of Ag2CrO4 is 1.1×1012 at 298k. The solubility (in mol/l) of Ag2CrO4 in a 0.1M AgNO3 solution is :

A
1.1×1010S
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B
3×108S
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C
2×108S
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D
2.5×108S
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Solution

The correct option is A 1.1×1010S
Ag2CrO42Ag++CrO42
AgNO3Ag++NO3
KspofAg2CrO4=1.1×1012
(2S+0.1)2(S)=1.1×1012 (Common ion effect)
Since, S <<< 0.1 , 2S can be neglected.
(0.01)S=1.1×1012
S=1.1×10120.01=1.1×1010
Hence, the correct option is A.

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