Chromatography

Question 1

What is chromatography useful for

Answer 1

to separate and analyse the substances present in a mixture

Question 2

What are the two phases of chromatography

Answer 2

1. stationary phase
2. mobile phase

Question 3

What is the pattern of bands or spots called

Answer 3

chromatogram

Question 4

What does the rate of movement of each component depend on

Answer 4

• how strongly the component adsorbs onto the stationary phase
• how readily the component dissolves in the mobile phase

Question 5

What is adsorption

Answer 5

the adhesion of molecules or substances to the surface of a solid or liquid

Question 6

What states is the stationary phase in

Answer 6

solid or liquid

Question 7

What states is the mobile phase in

Answer 7

liquid or gas

Question 8

What are the three simple forms of chromatography

Answer 8

paper, thin-layer, column chromatography

Question 9

What is the process of chromatography

Answer 9

Continual process of adsorption onto the solid stationary phase, followed by desorption and dissolving into the mobile phase

Question 10

What does the ability of the components to stick to the stationary phase depend on?

Answer 10

the polarity of the stationary phase and the component molecules