BVP Medical BVP Medical Solved Paper-2011

  • question_answer \[{{H}^{+}}\] ion concentration of an aqueous solution of \[{{K}_{2}}S{{O}_{4}}\] would be

    A)  \[{{10}^{-7}}\]                                 

    B)   \[>{{10}^{-7}}\]

    C)  \[<{{10}^{-7}}\]                               

    D)  \[{{10}^{-14}}\]

    Correct Answer: A

    Solution :

                    \[{{K}_{2}}S{{O}_{4}}\] is a salt of strong acid and strong base. \[2{{K}^{+}}+SO_{4}^{2-}+2{{H}_{2}}O2{{K}^{+}}+2O{{H}^{-}}\]                                                 \[+2{{H}^{+}}+SO_{4}^{2-}\] \[2{{H}_{2}}O2{{H}^{+}}+2O{{H}^{-}}\] Thus, its aqueous solution will be neutral with                 \[pH7\] (or  \[{{H}^{+}}=1\times {{10}^{-7}}\])


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