Spec J248
Step-by-step OCR GCSE Chemistry lessons by topic, building up to exam-style questions. Nail the core quantitative topics — moles, balancing equations and calculations — early on, since they underpin higher-tier questions across every paper and topic.
1 Particles
1.1 The particle model
1.2 Atomic structure
2 Elements, compounds and mixtures
2.1 Purity and separating mixtures
2.2 Bonding
2.3 Properties of materials
3 Chemical reactions
3.1 Introducing chemical reactions
3.2 Energetics
3.3 Types of chemical reactions
3.4 Electrolysis
4 Predicting and identifying reactions and products
4.1 Predicting chemical reactions
4.2 Identifying the products of chemical reactions
5 Monitoring and controlling chemical reactions
5.1 Monitoring chemical reactions
5.2 Controlling reactions
5.3 Equilibria
6 Global challenges
6.1 Improving processes and products
6.2 Organic chemistry
6.3 Interpreting and interacting with earth systems
