Chemical Reactions
Unit 3 overview: Chemical Reactions — OCR Gateway GCSE Combined Science A J250 - Chemistry Revision Notes & Topical Questions
5 min read 2 parts Lesson 1 of 20
Part 1 of 2Unit cover
Part 2 of 2Lessons in this unit
| Topic | Lessons |
|---|---|
| 3.1 Introducing Chemical Reactions | 3.1.1 Chemical Symbols and Formulae 3.1.2 Deducing Formulae Using Common Ions 3.1.3 Balancing Chemical Equations 3.1.4 Writing Balanced Ionic Equations 3.1.5 The Avogadro Constant 3.1.6 Conservation of Mass 3.1.7 Using Moles to Balance Equations 3.1.8 Calculating Masses from Balanced Equations |
| 3.2 Energetics | 3.2.1 Exothermic and Endothermic Reactions 3.2.2 Calculating Energy Changes |
| 3.3 Types of Chemical Reactions | 3.3.1 Oxidation and Reduction 3.3.2 Oxidation and Reduction in Terms of Electrons 3.3.3 Acids and Alkalis 3.3.4 Neutralisation 3.3.5 Effect of Hydrogen Ion Concentration on pH |
| 3.4 Electrolysis | 3.4.1 Electrolysis 3.4.2 Electrolysis of Aqueous Solutions 3.4.3 Reactions at Electrodes 3.4.4 Half Equations |
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