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Question

The concentration of the Ag+ ion in a saturated solution of Ag2CrO4 at 20oC is 1.5×104molL1. The solubility product constant of Ag2CrO4 at 20oC is:

A
3.4×1012
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B
1.7×1010
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C
1.7×108
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D
1.7×1012
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Solution

The correct option is D 1.7×1012
Ag2CrO42Ag++CrO24
now, [Ag+]=1.5×104M
[CrO24]=12×[Ag+]=1.5×1042=0.75×104M
Solubility product of Ag2CrO4,Ksp=[(Ag+)]2×[CrO24]
=(1.5×104)2×(0.75×104)
=1.7×1012

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