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  3. BCECE Medical

BCECE Medical BCECE Medical Solved Papers-2012

  • question_answer
    In the sample of soft drink, the concentration of \[{{H}^{+}}\] ion is \[3.8\times {{10}^{-3}}M\]. Its pH is

    A)  2               

    B)  2.42

    C)  3               

    D)  3.42

    Correct Answer: B

    Solution :

    \[pH=-\log \,[{{H}^{+}}]\]                 \[pH=-\log \,[3.8\times {{10}^{-3}}]\]                 \[pH=-(-3\log 10+\log 3.8)\] \[=+3-0.5798=2.4202\approx 2.42\]


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