Osmotic Pressure

• Osmotic pressure is the pressure applied by a hypotonic pressure that results in the movement of solvent molecules across the semi-permeable membrane.
• It is the minimum pressure that should be applied to the solution to prevent the inwards flow of pure solvent across the semi-permeable membrane.
• Osmotic pressure is the driving force of osmosis and the rate of osmosis increases as the osmotic pressure increases.

The osmotic pressure of a solution can be calculated as follow:

∏= MRT

Where ∏ is the osmotic pressure

M is the molar concentration of the solute

R is the gas constant

And T is the temperature of the system.