Question
10.1 g of a volatile liquid occupies a volume of 4 litres when vaporised at 100 C and 70 cm pressure. what would be the osmotic pressure of a 2% ( grams per 100 cc) solution of this substance at 0 C?
Joshi sir comment
10.1 g of a volatile liquid occupies a volume of 4 litres when vaporised at 100 C and 70 cm pressure.
first convert this volume to STP by using the formula P1V1/T1 = P2V2/T2
after getting the value of V2 , we can say that V2 volume contains 10.1 gm so 22.4 litre will contain 10.1*22.4/V2
thus we will get molar mass
now use πV = (w/M) RT
V = 0.1 litre, w = 2 gms, M = calculated above, T = 273 K