Osmosis and colligative properties

One osmole is an amount of particles equal to Avogadro s number (6.02 x 1023). 

The amount of osmotically active particles present per litre of solution (mmol.l-1). 

The pressure exerted within a sealed system of solution in response to the presence of osmotically active particles on one side of a semipermeable membrane (kPa). 

One osmole of solute exerts a pressure of 101.325 kPa when dissolved in 22.4 L of solvent at 0 °C. 

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