Fractional distillation

Question 1

Color of distillate

Answer 1

Colorless

Question 2

Odor of distillate

Answer 2

Alcohol

Question 3

Based on ignition test, which fraction represent higher concentrations of alcohol

Answer 3

First fractions (or first 3)

Question 4

Is fractional distribution more efficient than simple

Answer 4

Yes

Question 5

Account for possible reasons for the above difference

Answer 5

Fractions were separated further by fractionating column, this gives us more concentratwd fraction than simple distillation

Question 6

What is the role of the packing inside the fractionating column

Answer 6

Provides greater surface area on which the vapors can condense and re-evaporate and re-condense, essentially distilling the compounds many times over yielding a vapor richer than ethanol

Question 7

When is fractional distribution applicable

Answer 7

The need to separate components of liquid based on differences in their bp

Question 8

How can you say that each of the fractions is a mixture

Answer 8

Based on their bp range and no. of C atoms

Question 9

How does the no. of carbon atoms in a molecule affects it’s boiling point

Answer 9

The higher the no. of C atoms the higher the bp

Question 10

Which distillation provided better separation

Answer 10

Fractional (higher)