Calculation of Molar Mass from Osmotic Pressure
In dilute solutions the osmotic pressure is proportional to the molarity, C of the solution at a given temperature T. Mathematically,
ð = C R T
R= gas constant
ð = osmotic pressure = (n2/V) RT
V = Volume of a solution in litres
n2 = Moles of solute.
w2 = Grams of solute
M2 = Molar mass
Now, n2 = w2/M2
