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A saturated solution of CaF(2) is found ...

A saturated solution of `CaF_(2)` is found to contain `2 xx 10^(-4) M` of `F^(-)` ions. `K_(sp)` of `CaF_(2)` is:

A

`8 xx 10^(-12)`

B

`4 xx 10^(-12)`

C

`2 xx 10^(-12)`

D

`10^(-12)`

Text Solution

Verified by Experts

The correct Answer is:
B
`CaF_(2) hArr underset(s)Ca^(2+) + underset(2s)2F^(-)`
`2s = 2 xx 10^(-4)`
`s = 10^(-4)`
`K_(sp) = 4s^(3) = 4 xx 10^(-12)`
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