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JEE Main & Advanced Chemistry Equilibrium / साम्यावस्था Question Bank Critical Thinking

  • question_answer
    The pH of a solution at \[25{}^\circ C\] containing \[0.10\,m\] sodium acetate and \[0.03\,m\] acetic acid is \[(p{{K}_{a}}\]for \[C{{H}_{3}}COOH=4.57)\]       [AIIMS 2002; BHU 2002]

    A)                 4.09       

    B)                 5.09

    C)                 6.10       

    D)                 7.09

    Correct Answer: B

    Solution :

                    \[pH=p{{K}_{a}}+\log \frac{\text{ }\!\![\!\!\text{ salt }\!\!]\!\!\text{ }}{\text{acid}}\]\[=4.57+\log \frac{0.10}{0.03}=5.09\]


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