Seperating Mixtures

Question 1

Define solute and give example

Answer 1

A substance that dissolves is called a solute.

Example: salt or sugar

Question 2

Define solvent and give example

Answer 2

A substance that dissolves other substances is called a solvent.

Example: water

Question 3

Define soluble and give example

Answer 3

If a substance can dissolve, it is called soluble.

Examples: sugar or salt

Question 4

Define insoluble and give example

Answer 4

If a substance doesn’t dissolve, it is called insoluble.

Example: sand

Question 5

What method is used to separate sand and water mixture?

Answer 5

Filtration

Question 6

What method is used to separate out salt from water?

Answer 6

Evaporation

Question 7

Distillation allows us to separate liquids based on which property of the liquids?

Answer 7

Boiling points

Question 8

What is the boiling point of pure water?

Answer 8

100∞C

Question 9

What is the job of the condenser in distillation?

Answer 9

To condense gases into liquids

Question 10

Name the state change in going from liquid to gas

Answer 10

Evaporation

Question 11

Name two processes involved in distillation

Answer 11

Boiling/Evaporation and Condensation

Question 12

Describe how chromatography is used to separate dyes in an ink.

Answer 12

Different dyes move up the chromatography paper at a different rate, leading to separation.

Question 13

In chromatography, why is the line called the origin drawn using a pencil?

Answer 13

Pencil is insoluble in the solvent