2. Solved Papers
  3. BCECE Medical

BCECE Medical BCECE Medical Solved Papers-2009

  • question_answer
    A buffer contains equal concentrations of \[{{X}^{-}}\]and HX. The \[{{K}_{a}}\] for HX is \[{{10}^{-8}}\]. The pH of the buffer is

    A)  3                 

    B)  8

    C)  7                 

    D)  11

    Correct Answer: B

    Solution :

    Given,   \[[{{X}^{-}}]=[HX]\] For acidic buffer solution,                 \[pH=p{{K}_{a}}+\log \frac{[{{X}^{-}}]}{[HX]}\]                 \[pH=-\log \,{{10}^{-8}}+0\] \[\therefore \] \[pH=8\]


You need to login to perform this action.
You will be redirected in 3 sec spinner