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The solubility of CaF(2) (K(sp)=3.4xx10^...

The solubility of `CaF_(2) (K_(sp)=3.4xx10^(-11))` in `0.1 M` solution of `NaF` would be

A

`3.4xx10^(-12) M`

B

`3.4xx10^(-10) M`

C

`3.4xx10^(-9) M`

D

`3.4xx10^(-13) M`

Text Solution

Verified by Experts

The correct Answer is:
C
`underset(0.1)(NaF) rarr underset(0.1)(Na^(+))+underset(0.1)(F^(-))`
`CaF_(2) rarr Ca^(2+)+underset((2x+0.1)=0.1)(2F^(-))`
`K_(sp)=x(0.1)^(2)=3.4xx10^(-11)x=3.4xx10^(-9)`
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