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Find the concentration of hydroxide ion ...

Find the concentration of hydroxide ion in a 0.25 M solution of trimethylamine, a weak base.
`(CH_(3))_(3)N+H_(2)OhArr(CH_(3))_(3)+OH^(-),K_(b)=7.4xx10^(-5)`

Text Solution

Verified by Experts

`sigma alpha= sqrt((K_(b))/(c))= sqrt((7.4xx10^(-5))/(0.25))`
`=1.74xx10^(-3)`
`[OH^(-)]=c xx alpha`
`=0.25xx1.74xx10^(-3)`
`=4.32xx10^(-3)M`
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