Question

Assuming that the following salt solution have effective ion concentration equal to the actual salt concentration determine the approximate freezing point of the solution: 

 A 0.1 F potassium sulfate solution.

Answer 1

The freezing point depression ∆T = KF·m where KF is the molar freezing point depression constant and m is the molality of the solute. Rearrangement gives: mol solute = (m) x (kg solvent) where kg of solvent is the mass of the solvent (lauric acid) in the mixture. This gives the moles of the solute.