2. Solved Papers
  3. BCECE Engineering

BCECE Engineering BCECE Engineering Solved Paper-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