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A solution has `pH=5`, it is diluted `100` times, then it will becomeA. neutralB. basicC. unaffectesD. more acidic |
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Answer» Correct Answer - A `C_(H^(+))=10^(-pH)mol L^(-1)` Thus, pH = 5 means `C_(H^(+))= 10^(-5)mol L^(-1)` According to molarity equation, we have `M_(i)V_(i)= M_(f)V_(f)` `(10^(-5)mol L^(-1))(x)= M_(f)(100 x)` `:. M_(f)=10^(-7)mol L^(-1)` Under these conditions, the contribution of `H^(+)` from `H_(2)O` cannot be neglected. This will make the solutions slightly. acidic but practically neutral. In fact, its pH is `6.699~~7`. |
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