1.

A solution containing 50 g of ethaylene glycolin 200 g water is cooled to -9.3^(@)C. The amount of ice that will separate out will be (K_(f)="1.86 Km"^(-1))

Answer»

18.71 g
28.71 g
38.71 g
48.71 g

Solution :We have to calculate mass of liquid WATER that is PRESENT in the solution. The remaining will freeze as ice.
`DeltaT_(f)=(1000K_(f)w_(2))/(w_(1)M_(2))`
`9.3=(1000xx1.86xx50)/(w_(1)xx62)[M_(2)" for "{:(CH_(2)OH),(|),(CH_(2)OH):}=62]`
`or w_(1)=161.29g`
`THEREFORE"Ice separated out "=200-161.29=38.71g`


Discussion

No Comment Found

Related InterviewSolutions