Osmotic Pressure

Besides the boiling point elevation and freezing point depression, the osmotic pressure is associated with vapour pressure lowering, and it can be used to determine molar masses of dissolved solutes.

Semipermeable membrane : The osmotic pressure phenomenon involves the use of a semipermeable membrane. It is a film, such as cellophane, which has pores large enough to allow the solvent molecules to pass through them. These pores are small enough not to allow the passage of large solute molecules or ions of high molecular mas …