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6-2.Equilibrium-II (Ionic Equilibrium)
medium
What is the molarity of $F^-$ ions in a saturated solution of $BaF_2$ ? $(K_{sp} = 1.0 \times 10^{-6})$
A
$1.0 \times {10^{ - 2}}$
B
$1.0 \times {10^{ - 3}}$
C
$1.26 \times {10^{ - 2}}$
D
$6.3 \times {10^{ - 3}}$
Solution
$Ba{F_2}(s) \rightleftharpoons \mathop {B{a^{2 + }}}\limits_S (aq) + \mathop {2{F^ – }}\limits_{2S} (aq)$
$\mathrm{K}_{\mathrm{sp}}=4 \mathrm{S}^{3}$
$S=\left(\frac{K_{s p}}{4}\right)^{\frac{1}{3}}$
$\left[\mathrm{F}^{-}\right]=2 \mathrm{s}$
Standard 11
Chemistry
