AMU Medical AMU Solved Paper-2010

  • question_answer
    The charge balance equation of species in 0.100 M acetic acid solution is given by

    A)  \[[{{H}^{+}}]=[O{{H}^{-}}]\]

    B)  \[[{{H}^{+}}]=[C{{H}_{3}}CO{{O}^{-}}]\]

    C)  \[[{{H}^{+}}]=[O{{H}^{-}}]+[C{{H}_{3}}CO{{O}^{-}}]\]

    D)  \[2[{{H}^{+}}]=[O{{H}^{-}}]+[C{{H}_{3}}CO{{O}^{-}}]\]

    Correct Answer: D

    Solution :

                     \[C{{H}_{3}}COOHC{{H}_{3}}CO{{O}^{-}}+{{H}^{+}}\]                                 \[[C{{H}_{3}}CO{{O}^{-}}]=[{{H}^{+}}]\] ... (i)                 \[{{H}_{2}}O{{H}^{+}}+O{{H}^{-}}\]                 \[[{{H}^{+}}]=[O{{H}^{-}}]\]                                        ... (ii) From Eq. (i) and (ii), we get                 \[[{{H}^{+}}]+[{{H}^{+}}]=[C{{H}_{3}}CO{{O}^{-}}]+[O{{H}^{-}}]\]                        \[[2{{H}^{+}}]=[C{{H}_{3}}CO{{O}^{-}}]+[O{{H}^{-}}]\]


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