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2025 OCR GCSE Chemistry A Higher Tier PAPER 3 MARK SCHEME J248/03
4.1
OCR GCSE Chemistry A (Higher Tier) – Paper 3 Mark Scheme (J248/03) – 2025
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OCR GCSE Chemistry A (Higher Tier) – Paper 3 Mark Scheme (J248/03) – 2025


This mark scheme provides the official guidance for marking Paper 3 of the OCR GCSE Chemistry A (9–1) Higher Tier examination, outlining exactly how marks are awarded and what examiners expect in student responses.


It includes:




  • Detailed marking points for every question




  • Accepted alternative answers and correct scientific terminology




  • Step-by-step guidance for calculations, including units and method marks




  • Level-of-response descriptors for extended and evaluative questions




  • Guidance for data interpretation, graph analysis, and practical-based questions




  • Examiner notes highlighting common mistakes and how marks are credited




The mark scheme aligns fully with Paper 3 content, covering atomic structure, bonding, quantitative chemistry, chemical changes, and energy changes, ensuring accurate and consistent marking.


This resource is ideal for teachers, tutors, examiners, and students, supporting:




  • Marking mock exams accurately




  • Understanding examiner expectations




  • Improving exam technique




  • Learning how to structure high-mark Higher Tier answers



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Author virginia
Published 23 Jan 2026
Included files PDF
2025 OCR GCSE Chemistry A Higher Tier MARK SCHEME J248/03
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