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The freezing point of solution containin...

The freezing point of solution containing `0.2 g` of acetic acid in `20.0 g` of benzene is lowered by `0.45^(@)C`. Calculate the degree of association of acetic acid in benzene.
`(K_(f)=5.12 K^(@) mol^(-1) kg^(-1))`

Text Solution

Verified by Experts

`DeltaT_(f)=iK_(f)m`,`0.45=I xx 5.12 xx(0.2 xx 100)/(60 xx 20)`
`:.i=0.527`

` i=1-alpha+(alpha/2)=1-(alpha/2)`
`0.527 = 1-(alpha/2) rArr alpha =0.946`
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