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CET Karnataka Engineering CET - Karnataka Engineering Solved Paper-2004

  • question_answer
    In a mixture of acetic acid and sodium acetate the ratio of concentrations of the salt to the acid is increased ten times. Then the pH of the solution :

    A)  increases by one

    B)  decreases by one

    C)  decreases ten fold

    D)  increases ten fold

    Correct Answer: A

    Solution :

    Mixture of acetic acid and sodium acetate is an acidic buffer. Hence, from Henderson equation,                 \[pH=p{{K}_{a}}+\log \frac{[Salt]}{[Acid]}\] On increasing [Salt] ten times of that of [Acid], the pH will increase by one.


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