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JEE Main & Advanced Chemistry Equilibrium / साम्यावस्था Sample Paper Topic Test - Ionic Equilibrium

  • question_answer
    Taking \[Ba{{(OH)}_{2}}\] to be completely ionised. The pH of its 0.001 M solution is

    A) 11.3

    B) 2.7

    C) 11

    D) 3

    Correct Answer: A

    Solution :

    [a] \[[O{{H}^{-}}]=2[Ba{{(OH)}_{2}}]=2\times .001=2\times {{10}^{-3}}\]
    \[pOH=-\log 2\times {{10}^{-3}}\,=2.7\]
    \[pH=14-pOH=14-2.7=11.3\]


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