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JEE Main & Advanced Chemistry Equilibrium / साम्यावस्था Question Bank Self Evaluation Test - Equilibrium

  • question_answer
    For preparing a buffer solution of pH 6 by mixing sodium acetate and acetic acid, the ratio of the concentration of salt and acid should be \[({{K}_{a}}={{10}^{-5}})\]

    A) 1:10                 

    B) 10:1

    C) 100:1               

    D) 1:100

    Correct Answer: B

    Solution :

    [b] \[6=-log{{10}^{-5}}+log\frac{salt}{acid}=5+log\frac{salt}{acid}\] \[\log \frac{salt}{acid}\] must be1. \[\therefore \frac{salt}{acid}=\frac{10}{1}\,or\,10:1.\]


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