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

  • question_answer Which is the correct representation of the solubility product constant of \[A{{g}_{2}}Cr{{O}_{4}}\]            [NCERT 1974, 75]

    A)                 \[{{[A{{g}^{+}}]}^{2}}\,[CrO_{4}^{-2}]\]

    B)                 \[[A{{g}^{+}}]\,\,[CrO_{4}^{-2}]\]

    C)                 \[[2A{{g}^{+}}]\,\,[CrO_{4}^{-2}]\]         

    D)                 \[{{[2A{{g}^{+}}]}^{2}}\,\,[CrO_{4}^{-2}]\]

    Correct Answer: A

    Solution :

               \[A{{g}_{2}}Cr{{O}_{4}}\]⇌\[[2A{{g}^{+}}]+[CrO_{4}^{-\,-}]\]                                 Hence \[{{K}_{sp}}={{[A{{g}^{+}}]}^{2}}\,\,[CrO_{4}^{-\,-}]\]

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