An azeotropic mixture of benzene and toluene boils at and has a composition of
benzene and
toluene. If a solution of
benzene and
toluene is distilled, how much of the azeotropic mixture will be obtained?
64 g
68 g
70 g
72 g
The given solution contains 50 g of benzene and 50 g of toluene.
To obtain the azeotropic mixture, the solution is distilled until the temperature reaches . At this temperature, the vapour produced will have the same composition as the azeotropic mixture, which is
benzene
and toluene.
Let x be the amount of the azeotropic mixture obtained.
Since the composition of the azeotropic mixture is benzene and
toluene, we can write:
Solving these two equations, we get:
Therefore, approximately 70 g of the azeotropic mixture will be obtained. Hence, the correct answer is option C.