Colligative Properties of solutions

Colligative properties depend on the number of particles rather than their nature

• Lowering of the vapor pressure (Raoult’s law)

• Elevation of the boiling point (“ebulioscopy”)

• Depression of the freezing point (“cryoscopy”)

• Osmotic pressure

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•Changes in colligative properties depend only on the number of solute particles present, not on the identity of the solute particles.

•Among colligative properties are

ØVapor pressure lowering

ØBoiling point elevation

ØMelting point depression

ØOsmotic pressure