JEE Main & Advanced Chemistry Equilibrium Question Bank Common ion effect, Isohydric solutions, Solubility product, Ionic product of water and salt hydrolysis

  • question_answer The solubility product of silver sulphide is \[3.2\times {{10}^{-11}}.\]Its solubility at the experimental temperature is

    A)                 \[2\times {{10}^{-4}}\]moles per litre

    B)                 \[6\times {{10}^{-6}}\]moles per litre

    C)                 \[1.2\times {{10}^{-5}}\]moles per litre

    D)                 \[8\times {{10}^{-4}}\]moles per litre

    Correct Answer: A

    Solution :

               \[A{{g}_{2}}S\]⇌\[2A{{g}^{+}}+{{S}^{-\,\,-}}\]                    \[{{K}_{sp}}=4{{S}^{3}}\]                                 \[S=\sqrt[3]{\frac{{{K}_{sp}}}{4}}\]\[=\sqrt[3]{\frac{3.2\times {{10}^{-11}}}{4}}=2\times {{10}^{-6}}\]

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