Question

What molality of a nonvolatile, nonelectrolyte solute is needed to raise the boiling point of water by 8.00°C (Kb = 0.520°C/m)?

Answer 1

Answer is: molality of a nonvolatile, nonelectrolyte solute is 15,38 m.
ΔT = 8°C.
Kb = 0,520°C/m.
b = ?
ΔT = Kb · b.
8°C = 0,520°C/m · b.
b = 15,38 m = 15,38 mol/kg.
Nonelectrolyte means that compound has very little dissociation in water.