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Chemistry notebook Cambridge IGCSE 0620

Topic 7 of 12 · 3 modules planned

Acids, bases and salts

Acids and bases, how indicators reveal them and how to make a pure salt.

Modules

  1. Module 1 · syllabus 7.1

    Acids, bases and indicators

    What does a colour change tell you?

    This module is planned. It will have readings, an experiment, practice with self-checks and a final check.

Syllabus statements for this topic · for teachers · 20 statements

Core for every pupil · Supplement also for Extended entry. Paraphrased from the Cambridge IGCSE Chemistry 0620 syllabus (2026–2028); check the official syllabus for exact wording.

7.1 The characteristic properties of acids and bases

  • 7.1.1Acid reactions with metals, bases and carbonatesC
  • 7.1.2Acid colours: litmus, thymolphthalein, methyl orangeC
  • 7.1.3Base versus soluble alkaliC
  • 7.1.4Base reactions with acids and ammonium saltsC
  • 7.1.5Alkali colours: litmus, thymolphthalein, methyl orangeC
  • 7.1.6H+ and OH− in aqueous acids/alkalisC
  • 7.1.7Universal indicator, pH and relative hydrogen-ion concentrationC
  • 7.1.8Net ionic neutralisationC
  • 7.1.9Proton donor/acceptor definitionS
  • 7.1.10Complete versus partial acid dissociationS
  • 7.1.11HCl dissociation equationS
  • 7.1.12Ethanoic-acid dissociation equilibriumS

7.2 Oxides

  • 7.2.1Acidic/basic oxides: SO2, CO2, CuO, CaOC
  • 7.2.2Amphoteric oxide behaviourS
  • 7.2.3Al2O3 and ZnO classificationS

7.3 Preparation of salts

  • 7.3.1Soluble-salt preparation: titration or excess insoluble reagentC
  • 7.3.2Solubility families and exceptionsC
  • 7.3.3Hydrated versus anhydrous materialC
  • 7.3.4Insoluble salt by precipitationS
  • 7.3.5Water of crystallisation; CuSO4·5H2O, CoCl2·6H2OS