Question

Determine if either simple distillation set-up or fractionating set-up is most efficient for the following mixtures (for distillation)

2-butanone and t-butyl alcohol

Diethylene glycol

a mixture of diethyl ether and chlorobenzene

Answer 1

basics recall=

WHAT IS DISTILLATION

distillation is a method to separate a mixture of the liquid with the help of difference in boiling point. the process involves evaporation and condensation

what is a fractional distillation

multiple simple distillations in one go are fractional distillation. used in cases where liquids have closer boiling points

applying the principle to our examples

2-butanone and t-butyl alcohol

2-butanone = boiling point = 79.64

t-butyl alcohol = boiling point = 82

very clear that boiling points are closer and we need to use fractional distillaion for separation

Diethylene glycol = boiling point = 244

huge difference = simple distillation can be used

a mixture of diethyl ether and chlorobenzene

diethyl ether = boiling point = 34.6

chlorobenzene = boiling point = 137

huge difference simple distillation worth of doing