Question

If mole fraction of chloroform in ethanol is 0.2, then
the molality of chloroform in the solution is
(1) 5.43 m
(2) 2.72 m
(3) 6.81 m
(4) 4.51 m​

Answer 1

Answer:

Given,

Molefraction of the chloroform is 0.2=20

Solution=100

So mole fraction of water is 100−20=80

So the molality of the ethanol is:

80×46

=3680

For 3680gof solvent:

20×

3680

1000

=5.43mole