Question

Which of the following solution would be expected to have the lowest freezing point?

4.0 g of glycerin in 30 ml of water

6.0 g of glycerin in 30 ml of water

3.5 g of glycerin in 30 ml of

water

2.0 g of glycerin in 30 ml of

water​

Answer 1

Given that,

ΔT

f

=10

0

C

Now,

ΔT

f

=K

f

× molality

10=1.86×

92×600

x×1000

x=

1.86×1000

10×600×92

=296.8g

Wt. of glycerol taken ≈ 297g