ES Section 1 (b), (c), 12 hours PAG 4 Qualitative Main chemical ideas: Halogen chemistry; – – – (d), (e), (f), (g), (h), (i), (j), analysis of ions. redox chemistry and electrolysis. (k) Electrolysis of aqueous Explanations of the properties of halogens is The presence of halide solutions, e.g. copper required in OZ, but could be taught here to salts in the sea provides the chloride and sodium maintain the continuity of the chemistry. entry to the properties of chloride for example . – Balancing simple equations should be the halogens and reactions Redox reactions in introduced here. between halide ions. The and/or reduced scale, manufacture of bromine including of halogens and and chlorine then provide their compounds for – the context for discussion of examplere . redox chemistry, Using oxidation states to electrolysis and the balance simple redox nomenclature of inorganic equations (HSW3). compounds. Techniques and procedures in the electrolysis of aqueous solutions (HSW4).
ES – Section 1 – (b), (c), (d), (e), (f), (g), (h), (i), (j), (k) The presence of halide salts in the sea provides the entry to the properties of the halogens and reactions between halide ions. The manufacture of bromine and chlorine then provide the context for discussion of redox chemistry, electrolysis and the nomenclature of inorganic compounds. 12 hours PAG 4 – Qualitative analysis of ions. Electrolysis of aqueous solutions, e.g. copper chloride and sodium chloride – for example . Redox reactions in and/or reduced scale, including of halogens and their compounds – for examplere . Using oxidation states to balance simple redox equations (HSW3). Techniques and procedures in the electrolysis of aqueous solutions (HSW4). Main chemical ideas: Halogen chemistry; redox chemistry and electrolysis. Explanations of the properties of halogens is required in OZ, but could be taught here to maintain the continuity of the chemistry. Balancing simple equations should be introduced here.