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6-2.Equilibrium-II (Ionic Equilibrium)
medium
A salt $MX$ has $K_{sp} = 4 × 10^{-10}$ . What value of $K_{sp}$ must another salt $MX_3$ have if the molar solubility of the two salts is to be identical
A
$3.2 × 10^{-10}$
B
$1.024 × 10^{-19}$
C
$1.78 × 10^{-5}$
D
$4.32 × 10^{-18}$
Solution
Solubility of $\mathrm{MX}=\left(4 \times 10^{-10}\right)^{1 / 2}$
$\mathrm{MX}_{3}: \mathrm{K}_{-\mathrm{p}}=27 \mathrm{s}^{4}$
${=27\left(2 \times 10^{-5}\right)^{4}}$
${=4.32 \times 10^{-18}}$
Standard 11
Chemistry
