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Calculate the OH^(-) ion concentration o...

Calculate the `OH^(-)` ion concentration of 0.005 M solution of a weak base BOH if the degree of dissociation is 0.02.

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For a weak base, `[OH^(-)]=Calpha=0.005xx0.02=1xx10^(-4)"mol "dm^(-3)`
Ionisation constant of `NH_(4)OH` is `1.75xx10^(-5)` at 298 K.
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