RAJASTHAN PMT Rajasthan - PMT Solved Paper-2005

  • question_answer
    \[0.005\,\,M\]acid solution has\[5pH\]. The percentage ionization of acid is:

    A) \[0.8%\]                              

    B) \[0.6%\]

    C) \[0.4%\]                              

    D) \[0.2%\]

    Correct Answer: D

    Solution :

    We know that                 \[[{{H}^{+}}]={{10}^{-pH}}={{10}^{-5}}\]                       \[\alpha =\frac{actual\,\,concentration}{molar\,\,concentration}\]                           \[=\frac{{{10}^{-5}}}{0.005}=0.2\times {{10}^{-2}}\] \[\therefore \]percentage ionization\[=0.2\times {{10}^{-2}}\times 100\] \[=0.2%\]


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