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The precipitate of CaF(2) (K(sp)=1.7xx10...

The precipitate of `CaF_(2) (K_(sp)=1.7xx10^(-10))` is obtained when equal volumes of the following are mixed

A

`10^(-4)M Ca^(2+) + 10^(-4) N F^(-)`

B

`10^(-2)M Ca^(2+)+ 10^(-3) N F^(-)`

C

`10^(-5)M Ca^(2+) + 10^(-3) N F^(-)`

D

`10^(-3)M Ca^(2+) + 10^(-5) N F^(-)`

Text Solution

Verified by Experts

The correct Answer is:
B
For precipitation reaction, `Q_(IP) > K_(sp)`
`Q_(IP) = [Ca^(2+)][F^(-)]^(2) = (10^(-2)/2) xx (10^(-3)/2)^(2) = 1.25 xx 10^(-9) > K_(sp)`, precipitate will be be formed.
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