Freezing Point
| Formula / Notation | ΔT_f = K_f × m; K_f(H₂O) = 1.86°C·kg/mol |
|---|---|
| Also Known As | Solidification point, freezing temperature, melting point (same temperature), T_f |
What is Freezing Point?
The temperature at which a liquid changes to a solid at a given pressure. For water under standard conditions, the freezing point is 0°C. The freezing point of a solution is lower than that of the pure solvent (freezing point depression), a colligative property.
Formula & Notation
Other Names / Synonyms: Solidification point, freezing temperature, melting point (same temperature), T_f
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
The temperature at which a liquid changes to a solid at a given pressure. For water under standard conditions, the freezing point is 0°C. The freezing point of a solution is lower than that of the pure solvent (freezing point depression), a colligative property.
Freezing point data is used in: designing antifreeze solutions for automotive and aircraft de-icing (ethylene glycol, propylene glycol), cryoscopy for molar mass determination, food freezing and preservation, cryopreservation of biological samples (with cryoprotectants), and pharmaceutical freeze-dr…
Antifreeze solutions (ethylene glycol) are acutely toxic if ingested (causes metabolic acidosis and renal failure from oxalate formation). Salt-based road de-icers lower freezing points but cause corrosion of metal infrastructure and environmental impacts on vegetation and aquatic ecosystems.
The formula or notation for Freezing Point is: ΔT_f = K_f × m; K_f(H₂O) = 1.86°C·kg/mol