Q.

The solubility product of Ag2CrO4 is 32x10-12. What is the concentration of CrO4− ions in that solution?

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a

2×10−4M

b

16×10−4M

c

8×10−4M

d

8×10−8M

answer is A.

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Detailed Solution

Aq2CrO4⇌2Ag2S++CrSO42−;Ksp=(2S)2S=4S3 S=Ksp41/3=32×10−1241/3=2×10−4M
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