According to van’t Hoff equation
π = CRT
C = n / V
Here n = number of moles of solute dissolved in ‘V’ litre of the solution.
π = \(\frac{n}{V}\).RT = πV = nRT
If the solution is prepared by dissolving WB of the non-volatile solute in WA g of solvent, then the number of moles of ‘n’ is
\(n=\frac{W_B}{M_B}\)
where
MB = molar mass of the solute
Substituting n value, we get
From the above equation, we can calculate the molar mass of the solute.