MGIMS WARDHA MGIMS WARDHA Solved Paper-2008

  • question_answer
    Hydroxyl ion concentration of\[{{10}^{-2}}M\text{ }HCl\]is

    A) \[1\times 101\text{ }mol\text{ }d{{m}^{-3}}\]

    B) \[1\times {{10}^{-12}}\text{ }mol\text{ }d{{m}^{-3}}\]

    C) \[1\times {{10}^{-1}}mol\text{ }d{{m}^{-3}}\]                                                               

    D) \[1\times {{10}^{-14}}mol\text{ }d{{m}^{-3}}\]

    Correct Answer: B

    Solution :

    \[[{{H}^{+}}][O{{H}^{-}}]={{10}^{-14}}\] \[[{{10}^{-2}}][O{{H}^{-}}]={{10}^{-14}}\] \[[O{{H}^{-}}]=\frac{{{10}^{-14}}}{{{10}^{-2}}}\] \[={{10}^{-12}}mol\text{ }d{{m}^{-3}}\]


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