What is vapour pressure of a solution when 2 ~mol of a non-volatile solute are dissolved in 20 ~mol of water? ( P ₁^ =32 ~mm Hg )

Step-by-step solution

aligned & P ^ - P _ s P ^ = X _ solute = n _ solute n _ solute + n _ solvent & 32- P _ s 32 = 2 2+20 & 32- P _ s = 2 22 32=2.90 & P _ s =32-2.90 & =29.1 ~mm Hg aligned