1.

The concentration of `OH^(-)` ions in a `0.050 M HNO_(3)` solution isA. `2.0xx10^(-13)`B. `1.0xx10^(-13)`C. `0.5xx10^(-13)`D. `1.5xx10^(13)`

Answer» Correct Answer - A
Since `HNO_(3)` is a strong acid, it ionizes almost completely. Thus, the concentration of `H^(+)` ions form `HNO_(3)` is equal to the concentration of `H^(+)` ions form `HNO_(3)` is equal to the concentration of `HNO_(3)`, i.e., `5xx10^(-2)` . The contribution of `H^(+)` ions form water will be negligible.
`K_(w)=C_(H^(+))C_(OH^(-))`
`C_(OH^(-))=(K_(w))/(C_(H^(+)))=(1.0xx10^(-14))/(5xx10^(-2))`
`=2.0xx10^(-13)`


Discussion

No Comment Found

Related InterviewSolutions