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Stroniyum fluoride (SrF(2.)) is a sparin...

Stroniyum fluoride `(SrF_(2.))` is a sparingly soluble slat. Let`s_(1)` be its solubility (in mol/lt.) in pure water at `25^@C`, assuming no hydrolysis of `F^(-)` ions. Also let `s_(2)` be its solubility (in hydrolysis of `F^(-)`ion and no complex formation. However,it is known that `s_(1):s_(2)=10^(6):256`.
The `K_(sp)` value of `SrF_(2)` at `25^(@)` C is :

A

`2.048xx10^(-9)`

B

`1.372xx10^(-9)`

C

`1.864xx10^(-9)`

D

`2.916xx10^(-9)`

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a
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Stroniyum fluoride (SrF_(2.)) is a sparingly soluble slat. Let s_(1) be its solubility (in mol/lt.) in pure water at 25^@C , assuming no hydrolysis of F^(-) ions. Also let s_(2) be its solubility (in hydrolysis of F^(-) ion and no complex formation. However,it is known that s_(1):s_(2)=10^(6):256 . The solubility of SrF_(2) (in mol/L) in a buffer solution of pH=5 at 25^(@) C is :

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