Equilibrium and acids
- Equilibrium and Acid Reactions
- Acid/base Reactions
About this topic group
Analyse reversible systems before focusing on acid-base reactions.
Analyse reversible systems before focusing on acid-base reactions.
Study carbon compounds and the evidence used to identify substances.
Start with the current syllabus, then use matching papers and exam reference sheets.
The paper is worth 100 marks and gives approximately equal emphasis to Modules 5–8.
20 marks
80 marks
Twenty objective-response questions across the course.
Short and extended responses, including at least two questions worth 7–9 marks.
In 2025, 10,369 students completed Chemistry with a scaled mean of 32.0 out of 50 (the statewide all-course average is approximately 25).
Current · 2026
No content amendments were logged in 2024–2026. The latest recorded change was performance-band descriptor wording in 2023.
Caution · older papers
Papers from 2019–2025 match the current syllabus. Pre-2019 papers follow an older course with different content and structure.
Ahead · 2029 HSC
New Year 12 teaching begins in Term 4 2028. The first HSC under the Chemistry 11–12 Syllabus (2025) is in 2029.
Chemistry had above-average scaling in 2025. This isn’t guaranteed in future years.
Use the 2017 syllabus and 2019–2025 NESA papers for the 2026 HSC. Treat pre-2019 papers as selective topic practice.
NESA supplies the Chemistry Formulae Sheet, Data Sheet and Periodic Table. Bring an approved calculator and permitted equipment.
HSC · Year 12
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