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The freezing point (.^(@)C) of a solutio...

The freezing point `(.^(@)C)` of a solution containing `0.1 g` of `K_(3)[Fe(CN)_(6)]` (molecular weight 329) on `100 g` of water `(K_(f)=1.86 K kg mol^(-1))`

A

`-2.3xx10^(-2)`

B

`-5.7xx10^(-2)`

C

`-5.7xx10^(-3)`

D

`-1.2xx10^(-2)`

Text Solution

Verified by Experts

`Delta_(f)=iK_(f)m=4xx1.86xx(0.1//32.9)/(100//1000)=0.0226[K_(3)(Fe(CN)_(6))to3K^(+)+(Fe(CN)_(6))^(3-)]impliesi=4`
`implies` Freezing point in `-2.3xx10^(-2).^(@)C`
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