Solution I containing 1 g urea in 100 g of solution and Solution II contains 2 g of glucose in 100 g of solution. Which is the correct statement out of the following?
Answer & explanation
Correct answer: option 2
Colligative properties depend upon molal concentration.
Moles of urea = \(\frac{1}{60}\)
Mass of solvent = 100 - 1 = 99 g
Moles of glucose = \(\frac{2}{180}\)
Mass of solvent = 100 - 2 = 98 g
Molality of Solution I = \(\frac{1/60}{99}\) x 1000 = 0.168 m
Molality of Solution II = \(\frac{2/180}{98}\) x 1000 = 0.113 m
Freezing point of Solution I will be lower than Solution II.