C12

Question 1

Define pure

Answer 1

Contains one atom

Question 2

Define impure

Answer 2

Contains 2 or more molecules

Question 3

Does impure substances have high or low melting points.

Answer 3

Low melting points

Question 4

Define formulations

Answer 4

A mixture that had been designed to produce a useful product

Question 5

What’s the equation to find out the Rf in chromatography?

Answer 5

Spot distance moved / distance solvent moved

Question 6

Name 3 examples of formulations

Answer 6

Paint
Cosmetics
Pharmaceutical products

Question 7

What’s the solvent of chromatography?

Answer 7

Usually water

Question 8

What’s the mobile phase of chromatography?

Answer 8

Water

Question 9

What’s the stationary phase of chromatography?

Answer 9

Paper

Question 10

Does pure or impure substances have fixed melting points?

Answer 10

Pure = fixed melting points

Question 11

Define chromatography

Answer 11

A method of separation and analysis of a mixture of soluble chemical substances

Question 12

Name the 4 tests for gasses

Answer 12

Chlorine
Oxygen
Carbon Dioxide
Hydrogen

Question 13

What does Rf stand for?

Answer 13

Retention factor