JEE Main & Advanced Chemistry Equilibrium Question Bank Acids and Bases

  • question_answer In the equilibrium                 \[C{{H}_{3}}COOH+HF\]⇄ \[C{{H}_{3}}COO{{H}_{2}}^{+}+{{F}^{-}}\]       [BHU 1987]

    A)                 \[{{F}^{-}}\]is the conjugate acid of \[C{{H}_{3}}COOH\]

    B)                 \[{{F}^{-}}\]is the conjugate base of \[HF\]

    C)                 \[C{{H}_{3}}COOH\] is the conjugate acid of \[C{{H}_{3}}COO{{H}_{2}}^{+}\]

    D)                 \[C{{H}_{3}}COO{{H}_{2}}^{+}\] is the conjugate base of \[C{{H}_{3}}COOH\]

    Correct Answer: B

    Solution :

                    \[C{{H}_{3}}COOH+HF\]⇌\[C{{H}_{3}}COOH_{2}^{+}+{{F}^{-}}\].\[HF\] gives \[{{H}^{+}}\] to the \[C{{H}_{3}}COOH\]. So it is a conjugate base of HF.

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