COLLIGATIVE PROPERTIES
From WikiLectures
Colligative properties depend only on the osmolarity, i.e. number of dissolved particles in solution and not on their chemical nature (types of solutes). Non-colligative properties depend on the identity of the dissolved species and the solvent.
Increase of solution osmolarity causes:
- Osmotic pressure increase
- Vapour pressure decrease
- Freezing point decrease
- Boiling point increase
They have following consequences:
- Solution with higher osmolarity stays as liquid over larger range of temperatures compare to solution with lower osmolarity.
- The reduction of vapour pressure of a solvent is proportional to the molar concentration of the solute (Raoult's law).
