Question

At –10.00 °C (a common temperature for household freezers), what is the maximum mass of fructose (C6H12O6) you can add to 1.00 kg of pure water and still have the solution freeze? Assume that fructose is a molecular solid and does not ionize when it dissolves in water.

Answer 1

delta T = Kf*m
Solve for m fructose.

m = moles fructose/kg solvent
Solve for mole fructose

moles = grams/molar mass
You know moles fructose and molar mass fructose, solve for grams fructose.