Question

1. Mole fraction of iodine in benzene is 0.27 .calculate the molarity of iodine in C6H6
2. 20 ml of 0.1N Bacl2 is mixed with 30 ml of 0.2N .Al2(SO4)3 .how many grams of BaSO4 can be formed.

Answer 1

Explanation:

Mole fraction= 0.25

∴ In 100 moles 25 moles of I

2

& 75 moles are C

6

H

6

∴ Mass of benzene= 75×78=5850g (Molar mass of benzene= 78)

∴ For 5850g of solvent we have 25 moles of I

2

.

∴ For 1000g of solvent we have,

=

5850

1000×25

=4.27M

Hence molarity of the solution= 4.27M