Download Unit 32: Separating mixtures

Unit 32: Separating mixtures
32.1
Why do we need pure substances?
32.2
Methods of separation
Title
Key point(s)
32.1 Why do we need

pure substances?
32.2 Methods of
separation
Explaining why pure
Suggested teaching
method(s)

Teacher presentation
Location of teacher’s
resources

substances are needed
Electronic book and
PowerPoint (CD-ROM)

Filtration

Teacher presentation

Evaporation

Activity 32.1
PowerPoint and Video –

Crystallization
Separating the
Paper chromatography,

Distillation
colourings in
Crystallization,

Fractional distillation
chocolate beans –
Evaporation,

Separating two
running a paper
Distillation (CD-ROM)
immiscible liquids by
chromatogram

Teaching notes
Problem solving

Suggested answers to
separating funnel


Paper chromatography

Electronic book,
in-text activities
Suggested number of periods allocated for unit 32
Chemistry to be studied in
Number of periods for the
whole curriculum
Number of periods for the
core curriculum
S 3-5
S 4-5
4
3
5
4
Unit 33: Detection of substances
33.1
What is qualitative
analysis?
33.2
Identifying the
cation in a sample
33.3
Identifying the
anion in a sample
33.4
Uses of modern
chemical instruments
Title
33.1 What is qualitative
Key point(s)

analysis?
Measuring of qualitative
Suggested teaching
method(s)

Teacher presentation
Location of teacher’s
resources

analysis and quantitative
Electronic book and
PowerPoint (CD-ROM)
analysis
33.2 Identifying the
cation in a sample

Appearance

Teacher presentation

Flame test

Discussion

Solubility in water

Activity 33.1

Teaching notes

Reacting with dilute
Identifying the cation

Suggested answers to
sodium hydroxide
in an unknown sample

Problem solving
Tests for common gases

Teacher presentation
and water

Activity 33.2
solution


Electronic book and
PowerPoint (CD-ROM)
in-text activities
Reaction with ammonia
solution
33.3 Identifying the

anion in a sample



Electronic book and
PowerPoint (CD-ROM)
Reaction with dilute
Identifying the anion

Teaching notes
hydrochloric acid
in an unknown sample

Suggested answers to
Reaction with silver

Problem solving
nitrate solution

Activity 33.3
Identifying four
unlabelled white solid
sample

Activity 33.4
in-text activities
A project – Be a
bright consumer
Advantages of modern

Teacher presentation
chemical
instrumental analyses

Internet search &
instruments
over tradition methods
33.4 Uses of modern

presentation

Electronic book and
PowerPoint (CD-ROM)

Teaching notes

Suggested answers to
in-text activities
Suggested number of periods allocated for unit 33
Chemistry to be studied in
Number of periods for the
whole curriculum
Number of periods for the
core curriculum
S 3-5
8
8
S 4-5
5
6