IGCSE Chemistry Specification

Edexcel 4CH1

Section 2: (g) Acids, bases and salt preparations

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#2.34

know the general rules for predicting the solubility of ionic compounds in water:

- common sodium, potassium and ammonium compounds are soluble
- all nitrates are soluble
- common chlorides are soluble, except those of silver and lead (II)
- common sulfates are soluble, except for those of barium, calcium and lead (II)
- common carbonates are insoluble, except for those of sodium, potassium and ammonium
- common hydroxides are insoluble except for those of sodium, potassium and calcium (calcium hydroxide is slightly soluble).

#2.35

understand acids and bases in terms of proton transfer

#2.36

understand that an acid is a proton donor and a base is a proton acceptor

#2.37

describe the reactions of hydrochloric acid, sulfuric acid and nitric acid with metals, bases and metal carbonates (excluding the reactions between nitric acid and metals) to form salts

#2.38

know that metal oxides, metal hydroxides and ammonia can act as bases, and that alkalis are bases that are soluble in water

#2.39

describe an experiment to prepare a pure, dry sample of a soluble salt, starting from an insoluble reactant

#2.40C

describe an experiment to prepare a pure, dry sample of a soluble salt, starting from an acid and alkali

#2.41C

describe an experiment to prepare a pure, dry sample of an insoluble salt, starting from two soluble reactants

#2.42

practical: prepare a sample of pure, dry hydrated copper (II) sulfate crystals starting from copper (II) oxide

#2.43C

practical: prepare a sample of pure, dry lead (II) sulfate