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Introduction and Degree of Hydrolysis

The solubilit...

Question

The solubility of saturated solution of ${A g}_{2} C r O_{4}$ is $s$ mol L $^{- 1}$ . What is its solubility product?

4 s^{3}

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s^{3}

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2 s^{3}

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16 s^{2}

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Solution

The correct option is A $4 s^{3}$
The compound in aqueous solution will dissociate as follows:

${A g}_{2} C r O_{4} ⟶ 2 {A g}^{+} + {C r O_{4}}^{2 -}$

Equilibrium constant will be,

$K_{e q} = \frac{{[{A g}^{+}]}^{2} [C r O_{4}^{2 -}]}{[A g_{2} C r O_{4}]}$

$K_{s p} = [A g^{+}]^{2} [C r O_{4}^{2 -}]$ .

The solubility of $A g_{2} C r O_{4}$ is $s$ .

$K_{s p}$ will be $(2 s)^{2} \times s = 4 s^{3}$

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Similar questions

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