A solution of 30 g of non- volatile solute in exactly 90 g of water has vapor pressure of 2.8 kPa at 298 K. Further addition of 18 g of water causes vapor pressure to increase to 2.9 kPa at 298 K. Calculate 1) molar mass of solute 2) vapor pressure of pure water.

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Q. A solution containing

30 g m

of non-volatile solute exactly in

90 g m

of water has a vapour pressure of

2.8 k P a

298 K

. Further,

18 g m

of water is then added to the solution and the new vapour pressure becomes

2.9 k P a

298 K

Calculate: (i) molar mass of the solute (ii) vapour pressure of water at

298 K

QUESTION 2.19

A solution containing 30 g of non-volatile solute exactly in 90 g of water has a vapour pressure of 2.8 kPa at 298 K. Further, 18 g of water is then added to the solution and the new vapour pressure becomes 2.9 k Pa at 298 K. Calculate (i) molar mass of the solute (ii) vapour pressure of water at 298 K.

Q. The vapor pressure of water is