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Molar Solubility with a Salt

APCHEM-8LYZ1L

The $K_{sp}$ of $XF_2$ is $1.0 × 10^{-10}$.

What is the molar solubility of $XF_2$ in a solution containing 0.10 M $NaF$?

A

$4.0 × 10^{-30}$

B

$1.0 × 10^{-8}$

C

$1.0 × 10^{-7}$

D

$1.5 × 10^{-5}$