A current of dry air is passed through a bulb containing 5 g of a solute in 100 g of water and then through water alone. The losses in weight of the solution and pure water were respectively 0.78 g and 0.02 g. Calculate relative lowering of vapour pressure.

A current of dry air is passed through a bulb containing 5 g of a solu

1.	A current of dry air is passed through a bulb containing 5 g of a solute in 100 g of water and then through water alone. The losses in weight of the solution and pure water were respectively 0.78 g and 0.02 g. Calculate relative lowering of vapour pressure.
A.	2.04
B.	1.05
C.	0.03
D.	0.09
Answer» D. 0.09

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A current of dry air is passed through a bulb containing 5 g of a solute in 100 g of water and then through water alone. The losses in weight of the solution and pure water were respectively 0.78 g and 0.02 g. Calculate relative lowering of vapour pressure.

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