Question:

A solution is prepared by dissolving 0.6g of urea (molar mass = 60 gmol⁻¹) and 1.8g of glucose (molar mass = 180 gmol⁻¹) in 100mL of water at 27⁰C. The osmotic pressure of the solution is :(R = 0.08206 LatmK⁻¹mol⁻¹)

1.64 atm

4.92 atm

2.46 atm

8.2 atm

For mixed solutes in the solution, osmotic pressure; Π = (n₁ + n₂)/V × RT = (0.6/60 + 1.8/180) / 0.1 × 0.08206 × 300
Π = 4.9236 atm