Chromatography

Question 1

What is chromatography?

Answer 1

Chromatography is a technique used to separate mixtures into their individual components.

Question 2

True or False: Chromatography can only be used for liquid mixtures.

Answer 2

False

Question 3

What does Rf stand for in chromatography?

Answer 3

Rf stands for ‘retention factor.’

Question 4

Fill in the blank: The formula for calculating Rf value is Rf = ______ / ______.

Answer 4

distance traveled by substance / distance traveled by solvent front

Question 5

What is the purpose of the stationary phase in chromatography?

Answer 5

The stationary phase is used to retain the components of the mixture as they pass through.

Question 6

Multiple choice: Which of the following is NOT a type of chromatography? A) Gas chromatography B) Liquid chromatography C) Solid-state chromatography

Answer 6

C) Solid-state chromatography

Question 7

What does a higher Rf value indicate?

Answer 7

A higher Rf value indicates that the substance travels further up the chromatography medium.

Question 8

True or False: An Rf value can be greater than 1.

Answer 8

False

Question 9

What is the mobile phase in chromatography?

Answer 9

The mobile phase is the solvent that carries the mixture through the stationary phase.

Question 10

Short answer: Name one application of chromatography.

Answer 10

Chromatography is used in pharmaceuticals to purify compounds.