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

  • question_answer If the concentration of lead iodide in its saturated solution at \[{{25}^{o}}C\]be \[2\times {{10}^{-3}}\]moles per litre, then its solubility product is   [CPMT 1984]

    A)                 \[4\times {{10}^{-6}}\]  

    B)                 \[8\times {{10}^{-12}}\]

    C)                 \[6\times {{10}^{-9}}\]  

    D)                 \[32\times {{10}^{-9}}\]

    Correct Answer: D

    Solution :

               \[\underset{{{K}_{sp}}}{\mathop{Pb{{I}_{2}}}}\,\] ⇌ \[\underset{S\,\,\,\,\,\,}{\mathop{P{{b}^{++}}}}\,+\underset{2S\,\,\,}{\mathop{2{{I}^{-}}}}\,\]                                 \[{{K}_{sp}}=4{{S}^{3}}=4\times {{[2\times {{10}^{-3}}]}^{3}}\]\[=32\times {{10}^{-9}}\].

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