MHT CET 2017 Chemistry Solved Paper

(a) Osmotic pressure, π = CRT or π =

w

MV

RT
where, C = concentration of solution.
Given, w = 34.2g,V = 1L ,M = 342g mol−1
T = 20 °C, C = 20+ 273 = 293 °K
∴ π =

w

MV

RT
=

342.2g

342gmol−1

×

0.082LatmK−1mol−1×293K

1L

= 2.40 atm