Q: A 5 x 10-2 M solution of unknown identity at standard state at 298K is placed on one side of a semi-permeable membrane with pure water on the other side. Given that 3.6 atm of pressure is required to prevent the net flow of water across the membrane, what is the most likely identity of the unknown solution at standard state conditions? Osmotic Pressure ∏ = iMRT; where T is temperature, R = 0.08 L atm/mol·K, M is molarity, and i is the van't Hoff factor.
A		Ca(NO3)2
B		NaCl
C		ZnSO4
D		AlCl3

Stoichiometry | Quantitative Skills |