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Question 1

What is the analytical method used to separate the substances in a mixture (and identify them)?

Answer 1

Chromatography

Question 2

What are the two phases of chromatography?

Answer 2

Stationary and mobile

Question 3

What happens in the stationary phase of chromatography?

Answer 3

Molecules can’t move

Question 4

What happens in the mobile phase of chromatography?

Answer 4

Molecules can move (the solvent)

Question 5

What’s an example of the stationary phase?

Answer 5

Chromatography paper

Question 6

What’s an example of the mobile phase?

Answer 6

Water or ethanol

Question 7

What happens to substances that are more soluble in the mobile phase?

Answer 7

Move further

Question 8

What happens to pure substances in chromatography?

Answer 8

Will only ever form one spot

Question 9

What is the Rf value?

Answer 9

Ratio between distance travelled by the dissolved substance and solvent (solution-which climes the paper)

Question 10

How to calculate the Rf value?

Answer 10

Distance travelled by substance ,divided by the distance traveled by solvent