States Of Matter And Mixtures

Question 1

What do particles of solids have in between them?

Answer 1

Strong forces of attraction

Question 2

What’s it called going from a solid to liquid?

Answer 2

Melting

Question 3

What do liquid particles have in between them?

Answer 3

Some force of attraction

Question 4

What’s it called going from a liquid to a gas?

Answer 4

Evaporation

Question 5

What do gas particles have between them?

Answer 5

No force of attraction

Question 6

What happens when gas particles bounce off walls?

Answer 6

They exert a pressure on the walls

Question 7

What is it called going from a gas to a liquid?

Answer 7

Condensing

Question 8

What is it called going from a liquid to a solid?

Answer 8

Freezing

Question 9

What’s it called going from a gas to a solid?

Answer 9

Desublimation

Question 10

What’s it called going from a solid to a gas?

Answer 10

Sublimation

Question 11

What is a bad thing about chemical changes?

Answer 11

They are difficult to reverse

Question 12

What is a pure substance?

Answer 12

A substance completely made up of a single element or compound

Question 13

Why do impure substances have a range of melting points?

Answer 13

Because they are mixtures

Question 14

What is simple distillation used?

Answer 14

Used for separating out a liquid from a solution

Question 15

What are the 4 steps of simple distillation?

Answer 15

1. Put the solution in the conical flask
2. Heat it
3. Water vapour goes through condenser
4. Vapour condenses and goes into the beaker

Question 16

What is a problem with simple distillation?

Answer 16

Can only use it to separate things with very different boiling points

Question 17

What is fractional distillation used for?

Answer 17

Used to separate a mixture of liquids

Question 18

What are the 3 steps of fractional distillation?

Answer 18

1. Heat conical flask
2. Liquids evaporate in order of boiling points
3. Put each separated liquid into test tubes

Question 19

What is filtration?

Answer 19

Separating an insoluble solid from a liquid

Question 20

What is crystallisation?

Answer 20

Separates a soluble solid from a solution

Question 21

What is chromatography?

Answer 21

A method to separate the different colours of a mixture

Question 22

What is the mobile phase in chromatography?

Answer 22

The solvent that moves along the paper carrying the dissolved samples with it

Question 23

What is the stationary phase in chromatography?

Answer 23

The surface through which the solvent and dissolved substances in chromatography

Question 24

What is the equation for Rf value?

Answer 24

Distance travelled by solute/distance travelled by solvent

Question 25

What are the 3 steps of purifying water?

Answer 25

Sedimentation

Filtration

Chlorination

Question 26

What happens in sedimentation?

Answer 26

Sediment stick together

Question 27

What happens in filtration?

Answer 27

Removes most dirt

Question 28

What happens in chlorination?

Answer 28

Bacteria is removed

Question 29

What is deionised water?

Answer 29

Water which has had ions removed