IGCSE · Chemistry · Chapter 21

Ch 21 Experimental Techniques and Separation: complete notes

Neat, exam-ready notebook-style notes for Ch 21 Experimental Techniques and Separation, following the Cambridge IGCSE syllabus, Core and Extended. This chapter is part of the complete IGCSE Chemistry 0620 Complete Notes: All 22 Chapters, Core and Extended (Cambridge 2026–2028).

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What you get in the pack

• All 22 chapters of the Cambridge IGCSE Chemistry 0620 syllabus (exams 2026–2028): states of matter, atomic structure, bonding, stoichiometry and the mole, electrochemistry, energetics, rates, equilibrium, acids and salts, the Periodic Table, metals, environment, organic chemistry and experimental techniques
• Every syllabus statement covered in order, each marked Core or Extended, with clear notes and diagrams drawn for these notes
• Worked examples, practical skills and key definitions in every chapter
• Common mistakes taken from Cambridge examiner reports, so you know where marks are lost
• 20 quick-check MCQs per chapter with answers and explanations
• Original exam-style questions in the style of Paper 2 (multiple choice), Paper 4 (theory) and Paper 6 (alternative to practical), with full mark schemes (no past-paper reprints)
• Quick-reference sheet and an "I can" checklist at the end of every chapter
• Colour PDF and a black and white copy of every chapter for printing
• Independent notes; not endorsed by or affiliated with Cambridge University Press & Assessment

All chapters in this pack

1. Ch 1 States of Matter
2. Ch 2 Atoms, Elements and Isotopes
3. Ch 3 Bonding and Structure
4. Ch 4 Formulae, Equations and Relative Masses
5. Ch 5 The Mole and Calculations
6. Ch 6 Electrolysis and Fuel Cells
7. Ch 7 Chemical Energetics
8. Ch 8 Chemical Changes and Rates of Reaction
9. Ch 9 Reversible Reactions and Equilibrium
10. Ch 10 Redox
11. Ch 11 Acids, Bases and Oxides
12. Ch 12 Preparation of Salts
13. Ch 13 The Periodic Table
14. Ch 14 Metals, Alloys and Reactivity
15. Ch 15 Corrosion and Extraction of Metals
16. Ch 16 Water and Fertilisers
17. Ch 17 Air Quality and Climate
18. Ch 18 Organic Chemistry: Fuels and Alkanes
19. Ch 19 Alkenes, Alcohols and Carboxylic Acids
20. Ch 20 Polymers
21. Ch 21 Experimental Techniques and Separation
22. Ch 22 Identification of Ions and Gases