Part of the OCR GCSE Combined Science curriculum.
OCR GCSE Combined Science C3 Chemical Reactions is a step-by-step online learn guide for GCSE students in Years 10 and 11, mapped to the OCR specification (OCR GCSE (9–1) Gateway Science Combined Science A (J250) – C3 Chemical reactions). It covers formulae and equations, conservation of mass and the mole, reacting masses and concentration, energy changes in reactions, oxidation and reduction, acids, alkalis and pH, neutralisation and salts, electrolysis of molten compounds and electrolysis of solutions, then brings it all together with mixed retrieval and exam practice.
There are 29 short steps of about 15 minutes (roughly 7.5 hours of learning), each made of bite-size explanations with key words, tables and examples, and every bite-size is followed by an activity you check straight away. Key terms include Formula, Ion, Conservation of mass, Open system, Stoichiometry, Limiting reactant, Exothermic, Endothermic, Oxidation, Reduction, Acid and Alkali.
