Problem: Which of the following solutions will have the lowest freezing point? Input the appropriate letter.A. 35.0 g of C3H8O in 250.0 g of ethanol (C2H5OH)B. 35.0 g of C4H10O in 250.0 g of ethanol (C2H5OH)C. 35.0 g of C2H6O2 in 250.0 g of ethanol (C2H5OH)

FREE Expert Solution

We’re being asked to determine the solution will have the lowest freezing point.


Recall that the freezing point of a solution is lower than that of the pure solvent and the change in freezing point (ΔT­f) is given by:


ΔTf=Tf, pure solvent-Tf, solution


The change in freezing point is also related to the molality of the solution:


ΔTf=imKf


where: 

i = van’t Hoff factor

m = molality of the solution (in m or mol/kg)

Kf = freezing point depression constant (in ˚C/m)


The solution with the highest change in freezing point (ΔTf) will be the solution with the lowest freezing point

View Complete Written Solution
Problem Details

Which of the following solutions will have the lowest freezing point? Input the appropriate letter.

A. 35.0 g of C3H8O in 250.0 g of ethanol (C2H5OH)

B. 35.0 g of C4H10O in 250.0 g of ethanol (C2H5OH)

C. 35.0 g of C2H6O2 in 250.0 g of ethanol (C2H5OH)

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Freezing Point Depression concept. If you need more Freezing Point Depression practice, you can also practice Freezing Point Depression practice problems.