pi = osmotic pressure = i*M*RT
i = van't Hoff factor which for CaCl2 is 3
M = molarity = mols/L. You know moles from 5.5/molar mass CaCl2 and volume is 0.420 L = ?
R = gas constant. Use 0.08206 and pi will be in atmospheres.
T = kelvin temperature.
Post your work if you get stuck.
What is the osmotic pressure of a solution prepared by dissolving 5.50 g of CaCl2 in enough water to make 420. mL of solution at 29.2°C?
2 answers
Hi thank you so much I was using the wrong van't Hoff factor before.
2 answers