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2025 OCR GCSE Chemistry B Higher Tier PAPER 3 MARK SCHEME J258/03
4.1
OCR GCSE Chemistry B (Higher Tier) – Paper 3 Mark Scheme (J258/03) – 2025
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OCR GCSE Chemistry B (Higher Tier) – Paper 3 Mark Scheme (J258/03) – 2025

This mark scheme provides the official guidance for marking Paper 3 of the OCR GCSE Chemistry B (9–1) Higher Tier examination, outlining 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 method and final marks

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

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

  • Examiner notes explaining common mistakes and how marks are credited

The mark scheme aligns fully with Paper 3 content, covering atomic structure, bonding, quantitative chemistry, chemical reactions, acids and salts, 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 B Higher Tier SCIENCES J258/03 OCR
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