Chemistry

Cryoscopy


It is a colligative property that causes the decrease in the freezing temperature of the solvent.

It is caused by the addition of a nonvolatile solute in a solvent. It is related to the solidification point (PS) of the substances.

This property can also be called cryometry.

When comparing a pure solvent and a nonvolatile solute solution, it can be stated that the freezing point of the solution will always be less than the freezing point of the pure solvent.

The larger the number of particles dissolved in a solution, the lower its freezing point.

In countries where winter is very harsh, salt is added to the roads to lower the freezing temperature of the water, preventing ice from forming.

This property also explains why much of the seawater does not freeze at 0 ° C. The immense amount of salt dissolved in the seas and oceans causes its freezing point to decrease.

In cars, it is common to add an antifreeze to the radiators, ethylene glycol. This substance, in solution with water, decreases the freezing temperature to -37 ° C.