1.

A 0.2 molal aqueous solution of a weak acid (HX) is 20 percent ionised. The freezing point of this solution is (Given K_(f)=1.86.^(@)CKgmol^-1 for water):

Answer»

`-0.45^(@)C`
`-0.90^(@)C`
`-0.31^(@)C`
`-0.53^(@)C`

Solution :`DeltaT_(F)=0.2xx1.2xx1.86=0.45`
therefore FREEZING POINT `=-0.45^(@)C`


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