AQA Chemistry for
A-level Year 1
and AS
Authors: Lyn Nicholls and
Ken Gadd
Your A-level students will need increased maths
skills and stronger practical skills to successfully
tackle the demands of AS and A-level Chemistry.
Our resources will help you deliver comprehensive
support as students build the skills they need. Regular
opportunities to consolidate and track progress will build
towards confidence in the final examination.
• Supporting you through the changes – the change
in assessment structure will bring challenges – our
coherent structure of Student Books, Teacher Guides
and Skills and Practice resources will help you to
understand, plan for and master these challenges
• Assess and progress – from GCSE and across the
linear course with varied skills practice integrated
throughout the Student Books, Teacher Guides and
Skills and Practice resources on Collins Connect
• Prepare for practicals – develop your students’
theoretical understanding with advice and explanations
of best practice, plus carry out Required Practicals
effectively with full teacher support
• Help prepare students for further study and
The Student Books
have entered the
AQA approval process
scientific careers with plenty of stretch and challenge
questions that develop higher-order thinking skills
Teaching A level Chemistry, how the resources support you:
Linear assessment
Terminal assessment in the form
of three 2 hour papers at A-level
and two 1.5 hour papers on the
first four topics at AS Level
➜
•Extensive practice questions embedded
throughout help build synoptic understanding
•Online resources including video worked
examples and downloadable practice papers
develop the skills and written techniques that
students need for their final assessment
➜
•Comprehensive Required Practical sections
advise students on apparatus, techniques and
how best to avoid common errors
•Detailed support for teachers and technicians in
the Teacher Guides
•Practical based assignments and questions
integrated throughout the Student Book and
Teacher Guides.
➜
•Test and build mathematical skills with signposted
Assignments throughout
•Video worked examples in the Skills and Practice
resources model mathematical skills
➜
•Planning tools in the Teacher Guide and Student
Book content matched to the 2015 specification
enable you to easily co-teach AS and year one of
A-level
Practicals
Assessment of practical skills
will be by written exam only.
Practical-based questions will
form 15% of the total assessment
Maths
20% of assessment marks require
the use of Level 2 mathematical
skills
Standalone AS qualification
The AS becomes a stand-alone
qualification, which doesn’t
contribute to the A-level grade
Comprehensive Student Support
The complete content coverage that your
students will need. Help them build knowledge,
application and evaluation skills through
clear explanations set in real-life contexts,
supported by maths and practical skills-focused
assignments. Questions are integrated into
every chapter to check knowledge, test skills
and consolidate learning. Stretch and challenge
questions extend students’ understanding, and
extensive practice questions help prepare for the
final assessment.
In text questions provide
opportunities to check understanding
and progress, whether learning a
topic for the first time or revisiting it
as part of revision
Prior knowledge section at the
start of each chapter consolidates
knowledge from GCSE and gives
students a route into the topic
Key ideas summary
allows students to
check progress easily
and revise effectively
for examinations
Required practicals pages provide
comprehensive guidance on apparatus,
experimental techniques and how best
to avoid common errors
Boost understanding and
mathematical skills with
worked maths examples
Stretch and challenge
questions and
activities encourage
stronger students to
move beyond the
specification
Extensive end of
chapter practice
questions help
prepare for final
assessment
Signposted assignments
throughout build
confidence in Maths
skills, practical skills,
extended writing, AO2
and AO3
Comprehensive Teacher Support
Teacher Guides help you deliver a linear course confidently with a clear sequence of
learning mapped out in medium and long-term plans. The planning tools also enable you
to co-teach AS and A-level. A wealth of differentiated activity sheets provide inspiration for fresh
ways to develop students’ skills in maths, practicals, analysis and evaluation. These extensive
guides also provide support for hands-on practical work with activities, instruction guides and
technician notes.
Chapter 2: Amount of substance
Scheme of work
Chapter 2: Amount of substance
CHAPTER PLANNING
16 hours
This chapter includes a substantial amount of practical work including one of the Required practicals. Some of the
ideas dealt with resonate with Chapter 1, for example, Relative masses. Some of the lessons for Chapter 2 may
be taught in parallel or interspersed with lessons for Chapter 1.
Support progress
with a clearly
signposted sequence
of learning
You may wish to use some of the later lessons that are predominately focussed on practical skills and
experiments with lessons that are part of other chapters. For example, 2.11 Thermal decomposition could be part
of lessons about Group 2 metals, and 2.15 Relative formula mass of succinic acid could be part of lessons about
carboxylic acids.
Although Required practical 1: Make up a volumetric solution and carry out a simple acid–base titration is
positioned here, there is no reason why suitable practical activities such as 2.15 Relative formula mass of
succinic acid should not come later in the course and practical skills to be assessed for endorsement (required for
A-level, but not AS) demonstrated then.
ONE HOUR LESSONS
SPECIFICATION CONTENT
2.1 Relative masses
3.1.2.1 Relative atomic mass and relative molecular mass
Relative atomic mass and relative molecular mass in terms of 12C. The term relative
formula mass will be used for ionic compounds.
Students should be able to define relative atomic mass (Ar) and relative molecular
mass (Mr).
2.2 The mole
3.1.2.2 The mole and the Avogadro constant
The Avogadro constant as the number of particles in a mole. The mole as applied to
electrons, atoms, molecules, ions, formulae and equations. The concentration of a
substance in solution measured in mol dm-3.
Students should be able to carry out calculations using:
•
the Avogadro constant
•
mass of substance, relative molecular mass and amount in moles
•
concentration, volume and amount of substance in a solution.
2.3 Solutions
2.4 Mole calculations
Students will not be expected to recall the value of the Avogadro constant.
MS 0.1: Students carry out calculations using numbers in standard and ordinary form,
e.g. using the Avogadro constant.
MS 0.4: Students carry out calculations using the Avogadro constant.
MS 1.1: Students report calculations to an appropriate number of significant figures,
given raw data quoted to varying numbers of significant figures. Students understand
that calculated results can only be reported to the limits of the least accurate
measurement.
2.5 Ideal gas equation
2.6 Relative molecular
mass of a volatile liquid
3.1.2.3 The ideal gas equation
The ideal gas equation pV = nRT with the variables in SI units.
Students should be able to use the equation in calculations. They will not be expected
to recall the value of the gas constant, R.
AT a, b and k
PS 3.2: Students could be asked to find the Mr of a volatile liquid.
MS 0.0: Students understand that the correct units need to be in pV = nRT
MS 2.2, 2.3 and 2.4: Students carry out calculations with the ideal gas equation,
including rearranging the ideal gas equation to find unknown quantities.
2.7 Calculating empirical 3.1.2.4 Empirical and molecular formula
formulae
Empirical formula is the simplest whole number ratio of atoms of each element in a
2.8 Determine the
compound. Molecular formula is the actual number of atoms of each element in a
Chapter 2: Amount of substance
Activity sheet 2.4.1
Analysing potassium manganate(VII) solution
THE INVESTIGATION
Potassium manganate(VII) is an intense purplish black coloured crystalline solid. It dissolves readily in water and
the intensity of the colour depends on the concentration of potassium manganate(VII).
You will be given a solution of potassium manganate(VII) of unknown concentration. Your task is to make a series
of solutions of potassium manganate(VII) of known concentration and to determine the concentration of the
unknown by colour matching.
EQUIPMENT AND MATERIALS
•
•
•
•
•
•
•
8 x 100 cm3 beakers
1 x 250 cm3 measuring cylinder
2 x 25 cm3 measuring cylinders
electronic balance (capable of weighing to the nearest 0.01 g or better)
piece of white card or paper
potassium manganate(VII), KMnO4(s)
solution of potassium manganate(VII) of unknown concentration
PROCEDURE
Wear eye protection. Potassium manganate(VII) stains very easily, including skin (the purple stain slowly
becomes brown), so wear protective gloves when working with solid potassium manganate(VII) and its solutions.
Prepare a standard solution of potassium manganate(VII)
01. Place a 100 cm3 beaker on the balance pan and zero the balance. Measure 0.2 ±0.1 g potassium
manganate(VII) into the beaker and record the mass to the nearest 0.01 g.
02. Add about 20 cm3 of deionised water and swirl the contents to dissolve the potassium manganate(VII).
A-Level Chemistry Teacher Pack | Page 1 | ©HarperCollinsPublishers Limited 2015
03. Pour the solution into a 250 cm3 measuring cylinder, using a small funnel. Rinse the beaker using a wash
bottle to make sure all the potassium manganate(VII) solution has been washed into the cylinder. Make the
solution up to the 250 cm3 graduation mark. This is your standard solution.
Colour matching analysis
01. Label six 100 cm3 beakers A to F. Use the two measuring cylinders (one for the standard potassium
manganate(VII) solution and the other for deionised water) to measure these volumes into the beakers:
Beaker
A
B
C
D
E
Volume of standard solution of potassium manganate(VII)
20
16
12
8
4
0
Volume of water
0
4
8
12
16
20
Concentration of potassium manganate(VII) / g
F
dm-3
Measure the volumes as carefully as you can. Use dropper pipettes (one for the standard potassium
manganate(VII) solution and the other for deionised water) to make the final additions to the measuring cylinders.
Find inspiration for fresh
ways to develop students’
skills in maths, practicals,
analysis and evaluation with
a wealth of differentiated
Activity Sheets
02. Stand the beakers in a line on a white background, such as a sheet of white card or paper.
03. Measure 20 cm3 of solution of potassium manganate(VII)) of unknown concentration into a 100 cm 3 beaker.
04. Compare the unknown with the solutions you prepared by dilution of the standard potassium manganate(VII)
solution. Find which solution its colour most closely matches. Estimate the concentration of potassium
manganate(VII) in the unknown.
DATA ANALYSIS
Calculate the concentration of the potassium manganate(VII) standard solution in g dm-3.
Calculate the concentrations in solutions A-E, also in g dm-3.
Estimate the concentration of potassium manganate(VII) in the unknown solution.
A-Level Chemistry Teacher Pack | Page 15 | ©HarperCollinsPublishers Limited 2015
Online Skills and Practice Resources
on Collins Connect
Develop your students’ proficiency in key skills,
using our engaging subscription resources with an
emphasis on maths, written communication, AO2 and
AO3. Video worked examples focused on maths,
interactive example answers and a wealth of
downloadable practice question papers will help your
students develop and practise skills and prepare for exams.
AQA A-level Chemistry Student Book 1
9780007590216 Summer 2015
£24.99
AQA A-level Chemistry Student Book 2
9780007597635 January 2016
£24.99
AQA A-level Chemistry Teacher Guide 1 9780008114244 September 2015
£150.00
AQA A-level Chemistry Teacher Guide 2 9780008114251 January 2016
£150.00
AQA A-level Chemistry Year 1 and AS
Skills and Practice resources
Please email
[email protected] for
more information or to request a trial
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