AQA GCSE Chemistry Topic 4 – Chemical Changes

I have gone through the specification and these are the bits the examiners want you to know with links to my YouTube videos and other websites to help you understand any bits that are confusing. 


Whole topic summary video

Quick fire questions for this topic


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AQA Extended Revision Guide - Paperback (291 pages)

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Required Practicals 


AQA Chemistry

1 – Atomic Structure and the Periodic Table

2 – Bonding, Structure and the Properties of Matter

3 – Quantitative Chemistry

4 – Chemical Changes

Specification statement


These are the bits the exam board wants you to know, make sure you can do all of these…

Bits to help if you don’t understand

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I can describe the reaction between metal and oxygen



I can recall the order of the reactivity series




Total Learn

I can describe when a displacement reaction might take place


I can use experimental data to work out the order of reactivity


I can describe how unreactive metals are found in the Earth



I can describe reduction



I can describe the process of extracting aluminium by electrolysis



I can describe oxidation as the loss of electrons

Higher tier only



I can describe reduction as a gain of electrons

Higher tier only


I can write balanced ionic half equations

Higher tier only


I can determine which element in a reaction is oxidised or reduced from the equation

Higher tier only


I can use the general equation to give the products from a reaction



Total Learn

I can determine the formula of a salt from common ions



Common ions flash cards on

I can describe how to make a pure salt



I can describe the ions that lead to acidic and alkaline conditions


I can use the pH scale to describe how acidic or alkaline a solution is


I can use an equation to show neutralisation

Total learn

I can carry out a titration


I can calculate a concentration from titration data

Chemistry only


I can give examples of strong and weak acids

Higher tier only



Total Learn 

I can describe how concentration relates to pH

Higher tier only

I can use the terms strong, weak, concentrated and dilute in term of acids

Higher tier only


I can explain why compounds need to be molten or dissolved to conduct



I can describe the movement of ions during electrolysis



I can predict the products of electrolysis



Total Learn

I can write balanced half equations to describe what happens at each electrode


I can describe how to test for the production of chlorine gas



I can describe how to test for the production of hydrogen gas


I can describe how to test for the production of oxygen gas



I can describe what happens to aqueous solutions that are electrolysed



5 – Energy Changes

6 – The Rate and Extent of Chemical Change

7 – Organic Chemistry

8 – Chemical Analysis

9 – Chemistry of the Atmosphere

10 – Using Resources


AQA Biology

1 –  Cell biology

2 –  Organisation

3 –  Infection and response

4 –  Bioenergetics

5 –  Homeostasis and response

6 –  Inheritance, variation and evolution

7 –  Ecology



AQA Physics

1 –  Energy

2 –  Electricity

3 –  Particle Model of Matter

4 –  Atomic Structure

5 –  Forces

6 –  Waves

7 –  Magnetism and Electromagnets

8 –  Space Physics