Question

What is the osmotic pressure (in atm) of a 1.36M aqueous solution of urea [(NH2)2CO] at 22.0 degree celsius.?

Answer 1

The osmotic pressure is given by the equation

P = MRT

where P is the osmotic pressure, M is the concentration in molarity, R is the gas constant and T is the temperature. Careful about the units: see the example below. Osmotic pressures are often quite high.

Example: What is the osmotic pressure of a 1.00 molar sugar solution in water at 25oC?
Solution: Simply use the above equation and substitute in the proper values
P = MRT
P = 1.00 mol/L * 0.0812 (L*atm/mol*K) * 298 K
P = 24.5 atm

So.. When you use this example.
The solution is...

P=MRT = 1.36 mol/L * 0.0812 (L*atm/mol*K) * 295.15K = answer!!

Do the math~