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`100 ml` of sample is removed from an aqueous solution saturated with `CaSO_(4)` at `25^(0)C`. The water is completely evaported from the sample and deposit of `0.24 g` of `CaSO_(4)` is obtained. The `Ksp` of `CaSO_(4)` at `25^(0)C` will be.
A. `3.115 xx 10^(-4)`
B. `3.115 xx 10^(-5)`
C. `3.115 xx 10^(-6)`
D. `3.115 xx 10^(-3)`

1 Answer

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Best answer
Correct Answer - A
`CaSO_(4(s))hArrCa_((aq))^(+2) + SO_(4(aq))^(2-), Ksp = ?`
According to the given data, solubility of `CaSO_(4)` is `0.24 g` per `100 ml`
`[Ca^(+2)] = [SO_(4)^(2-)] = 0.01765 M`
`Ksp = [Ca^(+2)] [SO_(4)^(2-)]`

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