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JEE Main & Advanced Chemistry Equilibrium / साम्यावस्था Question Bank Hydrogenion concentration pH scale and buffer solution

  • question_answer
    \[pH\] of a solution is 5. Its hydroxyl ion concentration is [JIPMER 1999]

    A)                 5             

    B)                 10

    C)                 \[{{10}^{-5}}\]  

    D)                 \[{{10}^{-9}}\]

    Correct Answer: D

    Solution :

               \[pH=5\,\,\text{means}\,\,[{{H}^{+}}]={{10}^{-5}}\]                    \[pOH=14-pH=14-5=9\]                                 \[[O{{H}^{-}}]={{10}^{-pOH}}={{10}^{-9}}\]


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