Question

Urea forms an ideal solution in water . Determine the vapour pressure of aqueous solution containing 10% by mass of urea of 4°C​

Answer 1

Mass of urea = 10g

Mass of water=90g

Moles of urea= 10g/60g mol-1=1/6

Moles of water=90/18=5

Mole fraction of water

xA=5/5+16=5/31

Vapour pressure of solution

P=P°A.xA=55.3×5/31

P= 53.52mm Hg.

Answer 2

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