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

  • question_answer Solubility product of a salt AB is \[1\times {{10}^{-8}}\] in a solution in which concentration of A is \[{{10}^{-3}}M\]. The salt will precipitate when the concentration of B becomes more than  [MP PET 1990; KCET 2003]

    A)                 \[{{10}^{-4}}M\]              

    B)                 \[{{10}^{-7}}M\]

    C)                 \[{{10}^{-6}}M\]              

    D)                 \[{{10}^{-5}}M\]

    Correct Answer: D

    Solution :

               \[[B]=\frac{{{K}_{sp}}AB}{[A]}=\frac{1\times {{10}^{-8}}}{{{10}^{-3}}}=1\times {{10}^{-5}}M\]                    Where ionic product > \[{{K}_{sp}},\,ppt\] formed                                 \[\therefore \] 8 should be more then \[{{10}^{-5}}M\].

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