Edexcel Chemistry Unit 6 Past Papers
IA2 • WCH16/01
Externally assessed paper on practical chemistry from Units 4 and 5: planning, implementing, analysing and evaluating advanced experiments, including the IA2 core practicals.
Every Unit 6 question paper we hold, from 2019 to 2026, with its mark scheme and examiner report where available. Open any PDF in a new tab, or work through the topics below before you sit a full paper.
| Year & Session | Code | Title | Resources |
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What Unit 6 covers
- Core Practicals 9a and 9b: Following the rate of the iodine–propanone reaction by a titrimetric method and investigating a ‘clock reaction’ (Harcourt–Esson, iodine clock)
Deduce orders of reaction by titration and by an iodine clock reaction.
- Core Practical 10: Finding the activation energy of a reaction
Measure rate at several temperatures and use the Arrhenius equation to find Ea.
- Core Practical 11: Finding the Ka value for a weak acid
Use pH measurement and titration curves to determine Ka and pKa.
- Core Practical 12: Investigating some electrochemical cells
Build simple cells, measure EMF and compare with standard electrode potentials.
- Core Practicals 13a and 13b: Carry out redox titrations with both: (i) iron(II) ions and potassium manganate(VII) (ii) sodium thiosulfate and iodine
Manganate(VII)–iron(II) and thiosulfate–iodine redox titrations.
- Core Practical 14: The preparation of a transition metal complex
Synthesise and purify a transition metal complex and find the percentage yield.
- Core Practical 15: Analysis of some inorganic and organic unknowns
Combine qualitative tests, chromatography and spectra to identify unknowns.
- Core Practical 16: The preparation of aspirin
Synthesise aspirin, recrystallise it and test purity by melting point.