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JIPMER Jipmer Medical Solved Paper-2006

  • question_answer
    Given pH of a solution A is 3 and it is mixed with another solution B having pH 2. If both mixed, then resultant pH of the solution will be:

    A)  3.2                                        

    B)         1.9                        

    C)         3.4                                        

    D)         3.5

    Correct Answer: B

    Solution :

    pH of A = 3          pH of B = 2 \[\therefore \] \[[{{H}^{+}}]={{10}^{-3}}\,M,\]   \[[{{H}^{+}}]={{10}^{-2}}\,M\] Total \[[{{H}^{+}}]\] \[={{10}^{-3}}+{{10}^{-2}}={{10}^{-3}}+10\times {{10}^{-3}}\] \[=11\times {{10}^{-3}}\] \[\therefore \]   \[pH=-{{\log }_{10}}[{{H}^{+}}]=-\log \,(11\times {{10}^{-3}})\] \[=3-\log \,11\] \[=3-1.04=1.96\]


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