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EAMCET Medical EAMCET Medical Solved Paper-1997

  • question_answer
    The pH of the aqueous solution containing 0.49 g of \[{{\text{H}}_{\text{2}}}\text{S}{{\text{O}}_{\text{4}}}\]in one litre is:

    A)  2                                            

    B)  1

    C)  1.7                                        

    D)  0.3

    Correct Answer: B

    Solution :

                     Normality of \[{{H}_{2}}S{{O}_{4}}=\frac{Wt.}{Eq.wt.}\] \[=\frac{0.49}{49}\](Eq. wt. of \[{{H}_{2}}S{{O}_{4}}=49\]) \[=0.1={{10}^{-1}}\] This normality represents the hydrogen ion concentration. So, \[[{{H}^{+}}]={{10}^{-1}}\] Then, \[pH=\log \frac{1}{[{{H}^{+}}]}=\log \frac{1}{{{10}^{-1}}}\] \[=\log \,10\,\,=1\]


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