1.

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.

Answer»

`3.115 xx 10^(-4)`
`3.115 xx 10^(-5)`
`3.115 xx 10^(-6)`
`3.115 xx 10^(-3)`

Solution :`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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