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Question

If a saturated solution is prepared by dissolving Ag2CO3 in water has [Ag+]=2.56×104. What is the value of Ksp for Ag2CO3?

A
2.56×104
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B
2.56×108
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C
8.39×1012
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D
8.39×1010
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Solution

The correct option is C 8.39×1012
Given, [Ag+]=2.56×104
In saturated solution of Ag2CO3(s)
the dissociation equation is given by
Ag2CO3(s)+H2O2Ag+(aq)+CO23(aq)
Ksp=[Ag+]2[CO23]
Also, [CO23]=12[Ag+]
[Ag+]=2.56×104M
[CO23]=1.28×104M
So Ksp=[Ag+]2[CO23]=(2.56×104)2×(1.28×104)
Ksp=8.39×1012

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