The Grass Doctor

What is the vapor pressure of urea, if you dissolve 9 g of it in 10.0 mL of water at 24 Degrees Celsius?

Urea (NH2)2CO, which is widely used in fertilizers and plastics, is quite soluble in water. If you dissolve 9 g of urea in 10.0 mL of water, what is the vapor pressure of the solution at 24 Degrees Celsius? Assume the density of water is 1.00 g/mL.

Public Comments

1. Moles urea = 9 g / 60 g/mol =0.15 Mass water = 10.0g Moles water = 10.0 g / 18 g/mol = 0.556 Mole fraction water = 0.556 / 0.556 + 0.15 = 0.788 vapor pressure = vapor pressure water at 24°C x 0.788