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NEET AIPMT SOLVED PAPER SCREENING 2007

  • question_answer
                    Calculate the \[pOH\] of a solution at \[{{25}^{\text{o}}}C\] that contains \[1\times {{10}^{-10}}M\] of hydronium ions.              

    A)                 7.00       

    B)                 4.00                       

    C)                 9.00       

    D)                 1.00

    Correct Answer: B

    Solution :

                    \[[{{H}_{3}}{{O}^{+}}]=[{{H}^{+}}]={{10}^{-10}}\]                 \[pH+pOH=14\]                 \[pH=-\log [{{H}^{+}}]\]                 \[pH=-\log \,[{{10}^{-10}}]\]                 pH = 10                             pOH + 10 = 14                 pOH = 14 - 10 = 4  


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