C3.3.3 - Message in a bottle (paper chromatography)

Question 1

In chromatography, the water is referred to as the…

Answer 1

mobile phase

Question 2

Why is the chromatography paper referred to as the stationary phase?

Answer 2

Because the paper does not move (it is staitonary), the water moves through it.

Question 3

What doe the apparatus below show?

Answer 3

Paper chromatography being carried out

Question 4

How do you know that the ink came from the same pen?

Answer 4

Because the chromatograms are the same - the ink spots have separated the same amount of distance.

Question 5

Will a substance that mixes poorly (less soluble) with water travel far up chromatography paper?

Answer 5

No

Question 6

Explain how the separation of ink using paper chromatography works.

Answer 6

1. As water moves up the paper it combines with the ink.
2. Each component of ink dissolves into the water.
3. Each component is attracted to the paper more or less strongly.
4. The dyes travel up the paper at different speeds.
5. Each component stops at a different location on the paper/different distance from the initial line.

Question 7

The image produced during chromatography is referrred to as a…

Answer 7

chromatogram

Question 8

In paper chromatography the paper is referred to as…

Answer 8

the stationary phase

Question 9

Will a substance that mixes well (more soluble) with water travel far up chromatography paper?

Answer 9

Yes

Question 10

Which separation technique can we use to separate the components of a solution?

Answer 10

Paper chromatography

Question 11

Will a substance that is attracted to the chromatography paper travel far up the paper?

Answer 11

No

Question 12

Will a substance that is not attracted to the chromatography paper travel far up the paper?

Answer 12

Yes

Question 13

Why is water referred to as the mobile phase during chromatography?

Answer 13

Because the water moves (is mobile) through the paper.