Chemical reactions
Formulae and balanced equations
Use valencies or the stated species, then conserve atoms and charge.
One type, 8 sittings. Repeated examples stay together rather than becoming duplicate catalogue entries.
Open a linked question page and attempt the relevant question on paper or in your own notes. Then expand the marking instructions and check the same question number. Responses are not entered or saved on this page.
Grouping is rule-assisted and provisional. Always check the complete question, qualification, year and any supporting material. PDF viewer page numbers may differ from the printed page numbers.
Response forms found on linked pages
These describe the source-page wording, not a separate type count. A page may contain several subparts.
Choose a source example.
5 linked pages in 2025. The different years are examples of this same skill family, not additional types.
- Open question page (PDF opens in a new tab)
2025 · Paper 1 Multiple choice
Official PDFPDF viewer page 4. Other questions may share this page; choose the question or subpart testing formulae and balanced equations.
Check the published marking instructions
Match the question number in the paper. These links open complete marking PDFs; a matching marking page has not been inferred.
2025 marking · Paper 1 Multiple choice (PDF opens in a new tab) - Open question page (PDF opens in a new tab)
2025 · Paper 2
Official PDFPDF viewer page 7. Other questions may share this page; choose the question or subpart testing formulae and balanced equations.
Check the published marking instructions
Match the question number in the paper. These links open complete marking PDFs; a matching marking page has not been inferred.
2025 marking · Paper 2 (PDF opens in a new tab) - Open question page (PDF opens in a new tab)
2025 · Paper 2
Official PDFPDF viewer page 8. Other questions may share this page; choose the question or subpart testing formulae and balanced equations.
Check the published marking instructions
Match the question number in the paper. These links open complete marking PDFs; a matching marking page has not been inferred.
2025 marking · Paper 2 (PDF opens in a new tab) - Open question page (PDF opens in a new tab)
2025 · Paper 2
Official PDFPDF viewer page 10. Other questions may share this page; choose the question or subpart testing formulae and balanced equations.
Check the published marking instructions
Match the question number in the paper. These links open complete marking PDFs; a matching marking page has not been inferred.
2025 marking · Paper 2 (PDF opens in a new tab) - Open question page (PDF opens in a new tab)
2025 · Paper 2
Official PDFPDF viewer page 33. Other questions may share this page; choose the question or subpart testing formulae and balanced equations.
Check the published marking instructions
Match the question number in the paper. These links open complete marking PDFs; a matching marking page has not been inferred.
2025 marking · Paper 2 (PDF opens in a new tab)
ScotSpark hosts no copies of the papers or marking instructions. Historical archive copies are third-party resources. Source access does not grant permission to republish copyrighted material, and no independent subject-review sign-off is recorded for these groupings.