OCR GCSE Chemistry (J248)
Every topic with its OCR specification reference, free notes and tools to revise it, and your summer 2027 papers.
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| Topic | Spec | Notes and tools | How sure |
|---|---|---|---|
| Atomic structure and the periodic table | C1 and C2.1 | Atomic structure, isotopes and relative atomic massThe periodic table: groups 1, 7 and 0Separating mixturesAtomic structure and the periodic table: lessons and questions Molar massPeriodic table | |
| Bonding, structure and the properties of matter | C2.2 | Covalent bondingIonic bondingBonding, structure and the properties of matter: lessons and questions Periodic table | |
| Quantitative chemistry and the mole | C3.1 | Conservation of mass, percentage by mass and concentrationRelative formula mass, percentage by mass and molesQuantitative chemistry and the mole: lessons and questions Molar massPeriodic table | |
| Chemical changes: reactivity, acids and electrolysis | C3.2 to C3.4 | The reactivity series and extracting metalsChemical changes: reactivity, acids and electrolysis: lessons and questions Molar massPeriodic table | |
| Energy changes | C3.1 | Exothermic and endothermic reactionsEnergy changes: lessons and questions |
5 topics
| Topic | Spec | Notes and tools | How sure |
|---|---|---|---|
| Rates of reaction and equilibrium | C5 | Rates of reaction and collision theoryRates of reaction and equilibrium: lessons and questions Reaction rates | |
| Organic chemistry | C6.2 | Crude oil, alkanes, fractional distillation and crackingOrganic chemistry: lessons and questions Molar mass | |
| Chemical analysis | C2.1 and C4.2 | Pure substances and chromatographyChemical analysis: lessons and questions | |
| The atmosphere and using resources | C6.1 and C6.3 (J250: C6.1 and C6.2) | The atmosphere, greenhouse gases and pollutionThe Earth's atmosphere: lessons and questions Molar mass | |
| Required practicals and maths skills | practical activity groups and maths skills | Reaction ratesMolar mass |
Mock papers
Your summer 2027 exams
| Paper | Date | Starts | Length |
|---|---|---|---|
| Chemistry A Paper 1 or 3 J248/01 or 03 | Monday 17 May 2027 | 9:00 | 1h 45m |
| Chemistry A Paper 2 or 4 J248/02 or 04 | Tuesday 15 June 2027 | 9:00 | 1h 45m |
Foundation and Higher papers are sat at the same time, so one row covers both. Source: OCR GCSE final examination timetable, June 2027 (final timetable), read on Wed 7 Oct. PDF (opens a new tab)
Taking Combined Science? Its papers are on the exam timetable page. Exam timetables
Official OCR pages
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Search for J248 on the board's page to find this course.
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