Solubility product of A{s₂}{S₃} is 2.8 × {10^{ - 72}} . solubility of A{s₂}{S₃}

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6-2.Equilibrium-II (Ionic Equilibrium)

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The solubility product of $A{s_2}{S_3}$ is $2.8 \times {10^{ - 72}}$. What is the solubility of $A{s_2}{S_3}$

A

$1.09 \times {10^{ - 15}}\;mole/litre$

B

$1.72 \times {10^{ - 15}}\;mole/litre$

C

$2.3 \times {10^{ - 16}}\;mole/litre$

D

$1.65 \times {10^{ - 36}}\;mole/litre$

Solution

(a) ${K_{sp}} = [A{s^{3 + }}][{S^{2 – }}]$, $S = \sqrt[5]{{\frac{{{K_{sp}}}}{{108}}}}$

$ = \sqrt[5]{{\frac{{2.8 \times {{10}^{ – 72}}}}{{108}}}}$$ = 1.09 \times {10^{ – 15}}$

Standard 11

Chemistry

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