What this topic covers
Topic 3: Chemical changes has 2 subtopics:
- Reactions of acids
- Electrolysis
GCSE Edexcel Higher Combined Science Chemistry
Topic 3: Chemical changes – GCSE Edexcel Higher Combined Science Chemistry revision notes
Revise Topic 3: Chemical changes for GCSE Edexcel Higher Combined Science Chemistry, including Reactions of acids. 22 lessons across 2 subtopics.
Study acids, alkalis, salts, pH, and how electrolysis works. 22 lessons in 2 subtopics.
22
Lessons
2
Subtopics
Topic 3: Chemical changes lessons by subtopic
22 lessons, grouped by subtopic.
Reactions of acids
- Acid-Metal Reactions: Products and Patterns
- Redox in Acid-Metal Reactions
- What Salts Are Produced in Neutralisation?
- Neutralisation Reactions and Salt Formulae
- Making Soluble Salts from Acids
- Crystallising Salt Solutions and Making Pure Samples
- Understanding the pH Scale
- Acids, Alkalis and Neutralisation
- Introduction to Titrations
- Titration Calculations
- Understanding Acid Strength and Concentration
- pH Scale and Hydrogen Ion Concentration
- Core practical: pH change with calcium hydroxide and calcium oxide
- Core practical: preparing hydrated copper sulfate crystals
Electrolysis
- Understanding Electrolytes and Ion Movement
- Writing Half Equations for Electrolysis
- Products of Electrolysis in Molten Ionic Compounds
- Predicting Products in Aqueous Electrolysis
- Products at the Cathode and Anode
- Core practical: electrolysis of copper sulfate solution
- Understanding Electrode Reactions in Electrolysis
- Writing Half Equations for Electrode Reactions
More in this course
Go back to the full GCSE Edexcel Higher Combined Science Chemistry topic list, or practise this topic with past-paper questions.
Frequently asked questions
Is this the right Topic 3: Chemical changes page for my course?
These notes are for GCSE Edexcel Higher Combined Science Chemistry. If you are on a different exam board or tier, choose your course from the Combined Science Chemistry page instead, because the content is not always the same.
What should I do after reading the lessons?
Test yourself without the notes open, then try past-paper questions on the same topic. The questions you get wrong tell you which lesson to go back to.