A saturated solution prepared by dissolved $CaF_{2}(s)$ in water, has $\left\lbrack Ca^{2 +} ight brack = 3.3 imes 10^{- 4}$ M. What is the $K_{sp}$of $CaF_{2}$?

Question

A saturated solution prepared by dissolved $CaF_{2}(s)$ in water, has $\left\lbrack Ca^{2 +} ightbrack = 3.3 	imes 10^{- 4}$ M. What is the $K_{sp}$of $CaF_{2}$?

Dr. Abubacker · Accepted Answer

(a)
$CaF_{2}(s) ightleftharpoons {Ca}^{2 +}(aq) + 2F^{-}(aq)$
$\left\lbrack F^{-} ightbrack = 2\left\lbrack Ca^{2 +} ightbrack$
$= 2 	imes 3.3 	imes 10^{- 4}$
$= 6.6 	imes 10^{- 4}$ M
$K_{sp} = \left\lbrack Ca^{2 +} ightbrack\left\lbrack F^{-} ightbrack^{2}$
$= \left( 3.3 	imes 10^{- 4} ight)\left( 6.6 	imes 10^{- 4} ight)^{2}$
$= 1.44 	imes 10^{- 10}$

Q. A saturated solution prepared by dissolved $CaF_{2}(s)$ in water, has $\left\lbrack Ca^{2 +} \right\rbrack = 3.3 \times 10^{- 4}$ M. What is the $K_{sp}$of $CaF_{2}$?

Explanation

Reviewed by Dr. Abubacker

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