Rf values

Question 1

The less polar compound moves

Answer 1

Higher up the plate resulting in higher Rf value

Question 2

Will a more polar compound move close or far

Answer 2

It will stay close, it won’t move far because it is polar just like the silica gel

Question 3

Boiling point for A and B are different. Which distillation is best for separating the two liquids?

Answer 3

Fractional distillation

Question 4

True or False? The water-inlet is closer to the distilling head.

Answer 4

False

Question 5

What does the fractional distillation apparatus have that a simple distillation does not have?

Answer 5

Fractional column

Question 6

A student recovers 2.8mL toluene from 7mL solution of cyclohexane and toluene in an equal volume amount. What is the % recovery of toluene?

Answer 6

80%

Question 7

Formula for % recovery

Answer 7

(amt pure product recovered/amt crude material used) x 100

Question 8

Aluminum mesh is used in which distillation?

Answer 8

Fractional

Question 9

The separation of liquids is dependent on?

Answer 9

volatility (ability to vaporize)

Question 10

should solvent pairs have same polarity?

Answer 10

No

Question 11

What was used to separate liquids into two layers?

Answer 11

separatory funnel