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Calculate freezing point depression using cryoscopic constant, molality, and van't Hoff factor. Get instant, accurate results with our easy-to-use calculator.
Enter Solution Data
°C·kg/mol
Water: 1.86, Benzene: 5.12, Camphor: 40.0
mol/kg
Moles of solute per kg of solvent
1 for non-electrolytes, >1 for electrolytes
°C
Pure solvent freezing point
Results
Enter solution data to calculate freezing point depression
Freezing Point Depression Formula
Freezing Point Depression
ΔTf = i × Kf × m
- • ΔTf = Freezing point depression (°C)
- • i = Van't Hoff factor
- • Kf = Cryoscopic constant (°C·kg/mol)
- • m = Molality (mol/kg)
- • Tf(solution) = Tf(pure) - ΔTf
Key Concepts
- • Colligative property - depends on particle count
- • Higher molality = greater depression
- • Electrolytes have i > 1
- • Used in antifreeze, ice cream
- • Independent of solute identity