A solution containing 30 g of non-volatile solute 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 kPa at 298 K.
The molar mass of the solute will be :
1. 23 g mol−1
2. 34 g mol−1
3. 15 g mol−1
4. 46 g mol−1
1. | Leaves the vapour increases |
2. | Leaves the solution increases |
3. | Leaves the solution decreases |
4. | Leaves the vapour decreases |