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EAMCET Medical EAMCET Medical Solved Paper-2008

  • question_answer
    Identify Bronsted-Lowry acids in the reaction given.                             \[\underset{(A)}{\mathop{{{[Al{{({{H}_{2}}O)}_{2}}]}^{3+}}}}\,+\underset{(B)}{\mathop{HCO_{3}^{-}}}\,\underset{(C)}{\mathop{{{[Al{{({{H}_{2}}O)}_{5}}(O{{H}^{-}})]}^{2+}}}}\,\] \[\underset{(D)}{\mathop{+{{H}_{2}}C{{O}_{3}}}}\,\] The correct answer is

    A)  ,                             

    B)  (B,)

    C)  ,                             

    D)  ,

    Correct Answer: C

    Solution :

                     According to Bronsted-Lowry, acids are the substance which can donate a proton while bases are the substance which can accept a proton. A base after gaining a proton \[({{H}^{+}})\] gives conjugated acid. \[\underset{acid}{\mathop{{{[Al{{({{H}_{2}}O)}_{6}}]}^{3+}}}}\,+\underset{\begin{smallmatrix}  (B) \\  base \end{smallmatrix}}{\mathop{HCO_{3}^{-}}}\,\rightleftharpoons \]\[\underset{\begin{smallmatrix}  \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C \\  conjugate\,base \end{smallmatrix}}{\mathop{{{[Al{{({{H}_{2}}O)}_{5}}(O{{H}^{-}})]}^{2+}}}}\,+\underset{\begin{smallmatrix}  \,\,\,\,\,\,\,\,\,\,\,\,\,(D) \\  conjugate\,acid \end{smallmatrix}}{\mathop{{{H}_{2}}C{{O}_{3}}}}\,\] Hence, in the above reaction A and D are the acids.


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