1.

A solution of urea (molecular mass = 60 g mol^(-1))boils at 100.18^(@)C at atmospheric pressure. If K_(f) "and" K_(b) for water are 1.86 and 0.512 K kg mol^(-1) respectively, the above solution will freeze at :

Answer»

`0.654^(@)C`
`-0.654^(@)C`
`6.54^(@)C`
`-6.54^(@)C`

SOLUTION :`(DeltaT_(f))/(DeltaT_(B))=K_(f)/K_(b)`
`DeltaT_(f)=DeltaT_(b)=(0.18^(@))xx(1.86)/(0.512)=0.654^(@)C`
Freezing POINT of solution
= `0-0.654^(@)C=-0.654^(@)C`


Discussion

No Comment Found

Related InterviewSolutions