Topic 2

Question 1

Describe the arrangement, movement and the relative energy
of particles in a solid

Question 2

Describe the arrangement, movement and the relative energy
of particles in a gas

Question 3

Describe the arrangement, movement and the relative energy
of particles in a liquid

Question 4

Describe melting

Answer 4

Solid to liquid

Question 5

Describe freezing

Answer 5

liquid to solid

Question 6

Describe evaporation

Answer 6

liquid to gas

Question 7

Describe condensation

Answer 7

gas to liquid

Question 8

Describe subliming

Answer 8

solid to gas

Question 9

Describe depositing

Answer 9

gas to solid

Question 10

What is a pure substance?

Question 11

Simple distillation practical

Question 12

Fractional distillation practical

Question 13

Filtration practical

Question 14

Crystallisation practical

Question 15

Paper chromatography practical

Question 16

Why must water used in analysis not contain any dissolved salts?

Answer 16

Water not contain any dissolved ions. that might interfere with a chemical analysis

Question 17

How can waste and groundwater be made potable?

Answer 17

Waste and ground water can be made potable by sedimentation, filtration and chlorination. This is a suitable fresh water source of potable water. Water has already been filtered by rocks and needs less filtration. It will need to be sterilised with chlorine, or ozone, or ultraviolet light to kill microbes and pathogens.

Question 18

How can seawater be made potable?

Answer 18

By using distillation