InterviewSolution
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InterviewSolution
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Which of the following will have nearly equal pH ?A. 100 ml 0.1 M HCl mixed with 50 ml waterB. 50 ml `0.1 M H_(2)SO_(4)` mixed with 50 ml waterC. 50 ml of 0.1 M `H_(2)SO_(4) ` mixed with 100 ml waterD. 50 ml of 0.1 M HCl mixed with 50 ml of water |
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Answer» Correct Answer - A::C (a) 100 ml of 0.1 M HCl = 150 ml `xx` gt M HCl or `[HCl]=(1)/(15) M :. [H^(+)]=(1)/(15)M` (b) 50 ml of 0.1 M `H_(2)SO_(4) = 100 ml "of ? " MH_(2)SO_(4)` or `[H_(2)SO_(4)]=(1)/(20)M :. [H^(+)]=(1)/(10)M` (c) 50 ml of 0.1 `M H_(2)SO_(4) = 150 ml "of ?" M H_(2)SO_(4)` or `[H_(2)SO_(4)]=(1)/(30)M :. [H^(+)]=(1)/(15)M` (d) 50 ml of 0.1 M HCl = 100 ml of ? M HCl or `[HCl]=(1)/(20)M :. [H^(+)]=(1)/(20)M` (a) and (c) have same `[H^(+)]` and hence same pH. |
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