# Problem: Which solution has the lowest freezing point?A.. 10. g of KI dissolved in 100. g of waterB. 20. g of KI dissolved in 100. g of waterC. 30. g of KI dissolved in 100. g of waterD. 40. g of KI dissolved in 100. g of water

###### 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:

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

$\overline{){{\mathbf{\Delta T}}}_{{\mathbf{f}}}{\mathbf{=}}{{\mathbf{imK}}}_{{\mathbf{f}}}}$

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

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###### Problem Details

Which solution has the lowest freezing point?

A.. 10. g of KI dissolved in 100. g of water

B. 20. g of KI dissolved in 100. g of water

C. 30. g of KI dissolved in 100. g of water

D. 40. g of KI dissolved in 100. g of water

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.