1.

Calculate similtaneous solubility of silver thiocyanate and silver bromids in water .Given that K_(sp) of silver thiocyanate=10^(-12) and K_(sp) of silver bromids =5xx10^(-13) respcectively.

Answer»

Solution :Let the simultaneous solubility of `AGSCN` be `x` and that of `AgBr` is `y`.Then:
`AgSCNhArr underset(x+y)(AG^(+))+underset(x)(SCN^(-))"",,,,,,,,,,,""AgBrhArr underset(x+y)(Ag^(+))+underset(y)(Br^(-))`
`10^(-12)=XX(x+y)`....(i)
`5xx10^(-13)=y(x+y)`....(ii)
on SOLVING we get `x=2y`
so `y=4.08xx10^(-7)M` and `x=8.16xx10^(-7)M`


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