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7.3 Preparation of salts

Syllabus
0620–2026–2027
Topic
7.3
Level
—

7.3.1—Preparation, separation and

  • Describe preparation, separation and purification of soluble salts by reaction of an acid with: (a) an alkali by titration (b) excess metal (c) excess insoluble base (d) excess insoluble carbonate

7.3.2—Salt solubility rules: soluble

  • Describe salt solubility rules: soluble sodium/potassium/ammonium salts and nitrates; chlorides except lead/silver; sulfates except barium/calcium/lead; insoluble carbonates except sodium/potassium/ammonium; insoluble hydroxides except sodium/potassium/ammonium/calcium (partial)

7.3.3—Hydrated substance as a substance that

  • Define a hydrated substance as a substance that is chemically combined with water and an anhydrous substance as a substance containing no water

7.3.4—Preparation of insoluble salts by

  • Describe preparation of insoluble salts by precipitation

7.3.5—Term water of crystallisation as the

  • Define the term water of crystallisation as the water molecules present in hydrated crystals, including CuSO4•5H2O and CoCl2•6H2O

Objective notes

5 learning objectives
ConceptIGCSE Chemistry