(i) Prove that osmotic pressure is a colligative property.
(ii) Calculate the molar of urea solution if it exerts an osmotic pressure of 2.45 atmosphere at 300K. (R = 0.0821 L atm. `mol^(-1) K^(-1)`).

Explanation

(ii) `pi = cRT`
`2.45 = c xx 0.0821 xx 300`
`c= (2.45)/(0.0821 xx 300) = 0.099 mol L^(-1)`