Question

What is the vapor pressure at 25°C of a solution prepared by dissolving 20.0 g of CH 20 in 150.0 g of H2O? Pº H2O at 25°C = 23.7 mm Hg.

Answer 1

- A Per XA → mole traction of the solute. of the solution pressure PA y vapour pure solvent. PA - Vapour pressure of

moles of {Hizo = 209 1809lmul moles of H₂O = 150g 189 (hoad mole fraction of CH2 = 180 180 0-11 0.10111 + 8-3333 = 0.01315789474 = 0.01315789474 0.98684210526 - 1-001315789774 x 0.98684210526 A = 23.7 mm Hg x 0.9868 4210526 PA = 23-3881578947 mm Hg.