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Unit 32: Separating mixtures 32.1 Why do we need pure substances? 32.2 Methods of separation Title Key point(s) 32.1 Why do we need pure substances? 32.2 Methods of separation Explaining why pure Suggested teaching method(s) Teacher presentation Location of teacher’s resources substances are needed Electronic book and PowerPoint (CD-ROM) Filtration Teacher presentation Evaporation Activity 32.1 PowerPoint and Video – Crystallization Separating the Paper chromatography, Distillation colourings in Crystallization, Fractional distillation chocolate beans – Evaporation, Separating two running a paper Distillation (CD-ROM) immiscible liquids by chromatogram Teaching notes Problem solving Suggested answers to separating funnel Paper chromatography Electronic book, in-text activities Suggested number of periods allocated for unit 32 Chemistry to be studied in Number of periods for the whole curriculum Number of periods for the core curriculum S 3-5 S 4-5 4 3 5 4 Unit 33: Detection of substances 33.1 What is qualitative analysis? 33.2 Identifying the cation in a sample 33.3 Identifying the anion in a sample 33.4 Uses of modern chemical instruments Title 33.1 What is qualitative Key point(s) analysis? Measuring of qualitative Suggested teaching method(s) Teacher presentation Location of teacher’s resources analysis and quantitative Electronic book and PowerPoint (CD-ROM) analysis 33.2 Identifying the cation in a sample Appearance Teacher presentation Flame test Discussion Solubility in water Activity 33.1 Teaching notes Reacting with dilute Identifying the cation Suggested answers to sodium hydroxide in an unknown sample Problem solving Tests for common gases Teacher presentation and water Activity 33.2 solution Electronic book and PowerPoint (CD-ROM) in-text activities Reaction with ammonia solution 33.3 Identifying the anion in a sample Electronic book and PowerPoint (CD-ROM) Reaction with dilute Identifying the anion Teaching notes hydrochloric acid in an unknown sample Suggested answers to Reaction with silver Problem solving nitrate solution Activity 33.3 Identifying four unlabelled white solid sample Activity 33.4 in-text activities A project – Be a bright consumer Advantages of modern Teacher presentation chemical instrumental analyses Internet search & instruments over tradition methods 33.4 Uses of modern presentation Electronic book and PowerPoint (CD-ROM) Teaching notes Suggested answers to in-text activities Suggested number of periods allocated for unit 33 Chemistry to be studied in Number of periods for the whole curriculum Number of periods for the core curriculum S 3-5 8 8 S 4-5 5 6