# 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

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