<P> Osmotic concentration , formerly known as osmolarity , is the measure of solute concentration , defined as the number of osmoles ( Osm ) of solute per litre ( L ) of solution ( osmol / L or Osm / L ) . The osmolarity of a solution is usually expressed as Osm / L ( pronounced `` osmolar '' ) , in the same way that the molarity of a solution is expressed as `` M '' ( pronounced `` molar '' ) . Whereas molarity measures the number of moles of solute per unit volume of solution , osmolarity measures the number of osmoles of solute particles per unit volume of solution . This value allows the measurement of the osmotic pressure of a solution and the determination of how the solvent will diffuse across a semipermeable membrane ( osmosis ) separating two solutions of different osmotic concentration . </P>
<P> Osmotic concentration , formerly known as osmolarity , is the measure of solute concentration , defined as the number of osmoles ( Osm ) of solute per litre ( L ) of solution ( osmol / L or Osm / L ) . The osmolarity of a solution is usually expressed as Osm / L ( pronounced `` osmolar '' ) , in the same way that the molarity of a solution is expressed as `` M '' ( pronounced `` molar '' ) . Whereas molarity measures the number of moles of solute per unit volume of solution , osmolarity measures the number of osmoles of solute particles per unit volume of solution . This value allows the measurement of the osmotic pressure of a solution and the determination of how the solvent will diffuse across a semipermeable membrane ( osmosis ) separating two solutions of different osmotic concentration . </P>
the measurement of moles of solute per liter of solution is known as
the measurement of moles of solute per liter of solution is known as
molarity
molarity