InterviewSolution
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InterviewSolution
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The hydrogen ion concentration of a `10^(-8) M HCl` aqueous soultion at `298 K(K_(w)=10^(-14))` isA. `9.525xx10^(-8) M`B. `1.0xx10^(-8) M`C. `1.0xx10^(-6) M`D. `1.0525xx10^(-7) M` |
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Answer» Correct Answer - D `HClrarrunderset(10^(-8) M)(H^(+))+Cl^(-)` `H_(2)OhArrunderset(10^(-8)+a)(H^(+))+underset(a)(OH^(-))` `K_(w)=[H^(+)][OH^(-)]` `:. K_(w)=(10^(-8)+a)xxa` or `10^(-14)=10^(-8)a+a^(2)` or `a=0.95xx10^(-7)` `:. [H^(+)]=10^(-8)+0.95xx10^(-7)` `=1.05xx10^(-7)` |
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