Osmatic Pressure Formula
Osmosis:
The spontaneous flow of the solvent through a semipermeable membrane from a pure solvent to a solution (That is from dilute solution to concentrated solution ) is called osmosis.
Osmatic Pressure:
The minimum pressure that prevents osmosis is called osmatic pressure. Osmatic pressure denoted by π (pi).
OR
The excess pressure which must be exerted on the solution side in order to prevents the flow of solvent molecules toward the solution side when both are separated by semipermeable membrane is called osmatic pressure.
Formula :
π = CRT
π = osmatic pressure
C = Concentration of solution
R = Gas constant ( 0.0821 L atmmol-1 K-1 )
T = Temperature
- We can write the concentration ( C ) = n/V
So, put the value of concentration in the formula
- We can write the number of moles (n)
So we van write the molar mass
π = osmatic pressure
C = Concentration of solution
R = Gas constant ( 0.0821 L atm mol-1 K-1 )
T = Temperature
M = Molar mass ( g/mol)
W = Given mass (g)