Answer to Question #164474 in General Chemistry for Phyroe

Question

Assuming that the following salt solution has 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.