Lesson 18
8.2 Types of oxides
•Classify oxides as either acidic or basic, related to metallic and non-metallic characterSupplement
•Further classify other oxides as neutral or amphoteric
8.3 Preparation of salts
•Demonstrate knowledge and understanding of preparation, separation and purification of salts as examples of some of the techniques specified in section 2.2.2 and the reactions specified in section 8.1
•Demonstrate knowledge and understanding of the preparation of insoluble salts by precipitation
•Suggest a method of making a given salt from a suitable starting material, given appropriate information
8.4 Identification of ions and gasesCore
•Describe the following tests to identify:aqueous cations:aluminium, ammonium, calcium, chromium(III), copper(II), iron(II), iron(III) and zinc (using aqueous sodium hydroxide and aqueous ammonia as appropriate). (Formulae of complex ions are not required.)cations:use of the flame test to identify lithium, sodium, potassium and copper(II) anions:carbonate (by reaction with dilute acid and then limewater), chloride, bromide and iodide (by reaction under acidic conditions with aqueous silver nitrate), nitrate (by reduction with aluminium), sulfate (by reaction under acidic conditions with aqueous barium ions) and sulfite (by reaction with dilute acids and then aqueous potassium manganate(VII)) gases:ammonia (using damp red litmus paper), carbon dioxide (using limewater), chlorine (using damp litmus paper), hydrogen (using lighted splint), oxygen (using a glowing splint), and sulfur dioxide (using aqueous potassium manganate(VII)) 
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