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

  • question_answer
    50 \[ml\] of \[2\,N\]acetic acid mixed with \[10\,ml\] of \[1\,\,N\]sodium acetate solution will have an approximate \[pH\] of [MP PMT/PET 1988]

    A)                 4             

    B)                 5

    C)                 6             

    D)                 7

    Correct Answer: A

    Solution :

                    \[pH=p{{K}_{a}}+\text{log}\frac{\text{ }\!\![\!\!\text{ Salt }\!\!]\!\!\text{ }}{\text{ }\!\![\!\!\text{ Acid }\!\!]\!\!\text{ }}\]\[=-\log 2\times {{10}^{-5}}+\log \frac{10\times 1}{50\times 2}=4\].


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