Question

Urea forms ideal solution in water determine vapour pressure of aqueous solution containing 10 percent

Answer 1

Mass of urea = 10g

Mass of water = 90g

Moles of urea =10g/60gmol−1=16

Moles of water =90/18=5

Mole fraction of water

xA=5/5+26=5/31

Vapour pressure of solution

P=P∘A.xA

=55.3×5/31

P=53.52 mm Hg

The mole fraction will be (30/31)