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AMU Medical AMU Solved Paper-2006

  • question_answer
    At \[{{90}^{o}}C\], pure water has \[{{H}_{3}}{{O}^{+}}\] ion concentration \[{{10}^{-6}}mol\,{{L}^{-1}}\]. The \[{{K}_{w}}\] at \[{{90}^{o}}C\] is

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

    B)  \[{{10}^{-14}}\]

    C)  \[{{10}^{-12}}\]                               

    D)  \[{{10}^{-8}}\]

    Correct Answer: C

    Solution :

                     \[{{K}_{w}}=[{{H}^{+}}]\,[O{{H}^{-}}]\] \[=({{10}^{-6}})\times ({{10}^{-6}})\]      \[(\because \,\,[{{H}^{+}}]=[O{{H}^{-}}])\] = 10 - 12


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