Calculate the vapour pressure of a solution containing 9g of glucose in 162g of water at 293K. The vapour pressure of water of 293K is 17.535mm Hg.

Explanation

Weight of solute (w) = 9g, Weight of solvent (W) = 162g
Molecular weight of solute (mw) = 180, molecular weight of solvent Mw = 18
Vapour pressure of pure solvent = 17.535 vapour pressure of solution `P_(s)` = ?
`(P_(0)-P_(s))/(P_(0))=("w")/("mw")xx("MW")/("W")`
`implies(17.535-P_(s))/(17.535)=(9)/(180)xx(18)/(162)`
`17.535-P_(s)=17.535xx(9)/(180)xx(18)/(162)`
`implies17.535-P_(s)=0.0972`
`:. P_(s)=17.535-0.0972=17.4378" mm"`