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RAJASTHAN PMT Rajasthan - PMT Solved Paper-2006

  • question_answer
    What will be the \[pH\] value of  \[0.05\,\,M\]\[Ba{{(OH)}_{2}}\] solution?

    A) \[12\]                                   

    B)        \[13\]

    C)        \[1\]                                     

    D)        \[12.96\]

    Correct Answer: B

    Solution :

    \[0.05\,\,M\,\,Ba{{(OH)}_{2}}\]Solution                 \[\cong 2\times 0.05\,\,N\,\,Ba{{(OH)}_{2}}\]                 \[\cong 0.10\,\,N\,\,Ba{{(OH)}_{2}}\] \[\therefore \]  \[pOH=-\log [O{{H}^{-}}]\]                 \[=-\log (0.10)=1\]                 \[pH=14-pOH=14-1=13\]


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