Certificate in Chemistry (iGCSE) Scheme of Work
Year 9
May 2012
Gases and their compounds
Lesson
Learning Outcomes
Activities
Lesson 1
 recall the gases present
in air and their
approximate percentage
by volume
Starter - discuss what we
already know about oxygen
and complete a table, to
include, state at rtp, colour,
odour, density, solubility and
part in combustion
Oxygen

explain how experiments
involving the reactions of
elements such as copper,
iron and phosphorus with
air can be used to
investigate the
percentage by volume of
oxygen in air
 describe the laboratory
preparation of oxygen
from hydrogen peroxide,
using manganese(IV)
oxide as a catalyst
Finding out how much oxygen
there is in air. Demo
experiments with Copper and
Iron, show video clips of
Phosphorus burning in oxygen,
(on desktop in Chemistry
account)
Worksheets on these demos,
review this work.
From the results of these
demos discuss the percentage
of O2 in air, and the other gases
present – see work sheet.
Students draw a pie chart to
show the gases in air and their
properties
Plenary
Assessment
Safety
Other
emphasis
Worksheet to be
prepared!


Certificate in Chemistry (iGCSE) Scheme of Work
Year 9
May 2012
Gases and their compounds
Lesson
Learning Outcomes
Activities

Lesson 2
Making
Oxygen
Starter – Byker grove
demo, peroxide with
various catalysts. Discuss
the reaction fully and how
the MnO2 speeds up the
reaction.
 describe the laboratory
preparation of oxygen
from hydrogen
peroxide, using
manganese(IV) oxide
as a catalyst
 Practical – preparing oxygen
from hydrogen peroxide. See
worksheet

Also RSC 11 producing and
testing oxygen

Draw diagram and write up
method including the test for
oxygen.

Plenary – RSC video ‘Gases
from the air ‘ can be used
here.
Assessment
Safety
Other
emphasis
Certificate in Chemistry (iGCSE) Scheme of Work
Year 9
May 2012
Gases and their compounds
Lesson
Lesson 3
Oxides
Learning Outcomes
Activities
 describe the reactions
of magnesium, carbon
and sulfur with oxygen
in air, and the acidbase character of the
oxides produced
 Starter
Assessment
 Answer
question 3 on
page 59 in
 Demo burning carbon
IGCSE
sulfur and magnesium
textbook.
in oxygen. Test oxides
for pH with Universal
indicator
 understand that, in car
 Practical RSC 21
engines, the
temperature reached is
 Review practical –
high enough to allow
discuss acid oxides
nitrogen and oxygen
and their part in
from air to react,
producing acid rain
forming nitrogen
oxides
 Plenary
 understand that
nitrogen oxides and
sulfur dioxide are
pollutant gases which
contribute to acid rain,
and describe the
problems caused by
acid rain
Risk
Assessment
Other
emphasis


Certificate in Chemistry (iGCSE) Scheme of Work
Year 9
Feb 2012
Gases and their compounds
Lesson
Learning Objectives

Lesson 4
Acid Rain

describe the reactions of
magnesium, carbon and
sulfur with oxygen in air,
and the acid-base
character of the oxides
produced
Activities
Assessment
Risk
Assessment

Starter – review work
from last lesson.



Internet research plus
AQA book page ( orange)
172 to 175 (pink) 58 -61
Edexcel book pages 56 to
58
understand that carbon
dioxide is a greenhouse
gas and may contribute to
climate change.

understand that, in car
engines, the temperature
reached is high enough to
allow nitrogen and oxygen
from air to react, forming
nitrogen oxides

understand that nitrogen
oxides and sulfur dioxide
are pollutant gases which
contribute to acid rain, and
describe the problems
caused by acid rain
Students research the
following questions.
1. What effects do nonmetal oxide gases
have on the
environment .
2. How are these gases
formed in the
environment?
3. What are the results of
these two effects?
4. How do we deal with
these problems?
5. Include balanced
equations in your work.
6. Write a good
paragraph in your
books for each of
these problems.

Plenary – review this
work.
Answer these
questions
Explain why ( pg 59)
1. Burning a fuel
containing sulfur
as an impurity
causes acid rain
2. Petrol engines
produce oxides of
nitrogen
3. A car with a
catalytic converter
can still produce
pollution under
some
circumstances
Other
emphasis
Certificate in Chemistry (iGCSE) Scheme of Work
Year 9
May 2012
Gases and their compounds
Lesson
Lesson 5
Carbon
dioxide
Learning Outcomes
Activities
 describe the properties Starter What is carbon
dioxide?
of carbon dioxide,
limited to its solubility
Demo - RSC 56 Density
and density
of carbon dioxide pouring CO2 from a gas
jar onto a candle flame

Discuss why this
happens in terms of
density etc.
Practical work –
solubility carbon dioxide,
see RSC worksheet 30.
Be prepared to discuss
what is happening in the
reaction, see worksheet.
Write notes
Plenary – summarise the
properties of carbon dioxide.
Assessment
Risk
Assessment
Other
emphasis




Indicators are
harmful
Certificate in Chemistry (iGCSE) Scheme of Work
Year 9
May 2012
Gases and their compounds
Lesson
Lesson 6
Preparation of
carbon
dioxide
Learning Outcomes
 describe the
laboratory
preparation of
carbon dioxide from
calcium carbonate
and dilute
hydrochloric acid
Activities
Starter - ask student how they
think carbon dioxide can be
prepared in the lab.
Practical - calcium carbonate
with hydrochloric acid, use
delivery arm into limewater.
Students draw apparatus to
collect gas under water, write a
method and a balanced equation
for the reaction
Plenary – compare and contrast
this method with lab method for
prep of oxygen
Assessment
Safety


Other
emphasis
Certificate in Chemistry (iGCSE) Scheme of Work
Year 9
May 2012
Gases and their compounds
Lesson
Learning Outcomes
Activities
Starter
Lesson 7
●
Thermal
decomposition
●
describe the
formation of carbon
dioxide from the
thermal
decomposition of
metal carbonates
such as copper(II)
carbonate
explain the use of
carbon dioxide in
carbonating drinks
and in fire
extinguishers, in
terms of its solubility
and density
 Practical RSC 66
●
●
●
●
The effect of heat on metal
carbonates
Review Practical, write word
and balanced equations
Review properties of carbon
dioxide and discuss it’s uses,
fire extinguishers and
carbonating drinks
Plenary
Assessment
Risk
Assessment
 Pupils write a 
paragraph to
link the
properties of
carbon
dioxide to its
uses.
Other
emphasis

Certificate in Chemistry (iGCSE) Scheme of Work
Year 9
May 2012
Gases and their compounds
Lesson
Learning Objectives
Lesson 8
Hydrogen

describe the
combustion of
hydrogen

describe the use of
anhydrous copper(II)
sulfate in the chemical
test for water
Activities
Assessment
Risk
Assessment

Starter - hydrogen balloon,
discuss the reaction taking
place and write balanced
equation discourage any
ideas that there is
hydrogen in the air.



Practical - testing for water
– quick pract allowing time
for next activity
1. CuSO4 heat to produce
white anhydrous copper
sulfate in a test tube,
allow to cool then add a
few drops of water.
2. Cobalt chloride paper,
see page 93 in text book
NB Water does not
need to be pure for
these tests

Activity – How could you
purify water if you had no
fresh water to drink? Write
out a method. Allow and
encourage any non lab
methods of distilling water.

Plenary - review these
ideas.
 describe a physical test
to show whether water
is pure.
Page 97 Q 1
Other
emphasis
Certificate in Chemistry (iGCSE) Scheme of Work
Year 9
May 2012
Gases and their compounds
Lesson
Learning Outcomes
Activities

describe a physical test
to show whether water
is pure.


describe the reactions of
dilute hydrochloric and
dilute sulfuric acids with
magnesium, aluminium,
zinc and iron
Starter - Demo distill a
sample of dirty water,
muddy, inky, to show
production of clean water.
Student draw apparatus.
Point out that water distills
at a constant temperature,
100°C

Activity - ask students
how they would go about
producing hydrogen in the
lab, small group work,
reviewed in whole class.

Practical activity – Page
73 in IGCSE book, without
thistle funnel, H2 collected
under water and then
tested with a lighted splint.
NB addition of CuSO4 to
produce copper catalyst.

Draw apparatus and write
balanced equations for the
reactions of all four metals
with HCl and H2SO4

Plenary
Lesson 9
Producing
Hydrogen
Assessment
Risk Assessment


Prepare for test
next lesson
Other
emphasis

Certificate in Chemistry (iGCSE) Scheme of Work
Year 9
May 2012
Gases and their compounds
Lesson
Learning Outcomes
Activities
Assessment

Test
Lesson 10
Test
Lesson 11
Test and target
review
Review tests
Use electronic mark scheme to
review work if possible so students
see the correct answers expected.
Consider lessons learned seen
during marking and pass on to
students.
Students consider their
performance against their target and
complete front sheet with ‘what went
well’ and ‘even better if’
Risk
Assessment

Other
emphasis
