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CaF(2) has a K(sp)=3.9xx10^(-11) at 25^(...

`CaF_(2)` has a `K_(sp)=3.9xx10^(-11)` at `25^(@)` C. What is the `[F^(-)]` in a saturated solution of `CaF_(2)` at `25^(@)` C?

A

`2.1xx10^(-4)`

B

`3.4xx10^(-4)`

C

`4.3xx10^(-4)`

D

`6.8xx10^(-4)`

Text Solution

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The correct Answer is:
c
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