OCR•GCSE•Chemistry
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Chemical Reactions
Equations, acids and bases, electrolysis, and energy changes
Practice 60 subtopics in Chemical Reactions. All questions match the OCR GCSE specification.
About Chemical Reactions
Chemical Reactions is a key topic in the OCR GCSE Chemistryspecification. This topic covers equations, acids and bases, electrolysis, and energy changes.
Master all 60 subtopics below with unlimited AI-generated questions. Each subtopic page includes sample questions and the ability to generate unlimited practice questions with detailed solutions.
All Subtopics (60)
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Word equationsBalanced symbol equationsConservation of massRelative formula mass (Mr)Calculating relative formula massThe moleAvogadro constantMoles calculationsMass from molesMoles from massReacting mass calculationsLimiting reactantsConcentration of solutionsConcentration in g/dm³Concentration in mol/dm³ (HT)Volume of gasesMolar volume at RTP (HT)Percentage yieldCalculating percentage yieldAtom economyCalculating atom economyAcids and alkalisThe pH scaleIndicatorsUniversal indicatorNeutralisationReactions of acids with metalsReactions of acids with metal oxidesReactions of acids with metal hydroxidesReactions of acids with metal carbonatesMaking saltsSoluble saltsInsoluble saltsStrong acids (HT)Weak acids (HT)Hydrogen ion concentration (HT)ElectrolysisElectrolytesElectrodesAnode and cathodeElectrolysis of molten compoundsProducts at electrodesElectrolysis of aqueous solutionsElectrolysis of sodium chloride solutionHalf equations (HT)Extraction of aluminiumPurification of copperExothermic reactionsEndothermic reactionsExamples of exothermic reactionsExamples of endothermic reactionsTemperature changesPractical: measuring temperature changesReaction profilesActivation energyCatalysts and activation energyBond energies (HT)Breaking bonds (HT)Making bonds (HT)Calculating energy changes (HT)
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