Chemistry in Society (N5)

The key areas covered in this Unit are:

metals — metallic bonding and resulting electrical conductivity; balanced ionic equations for reactions of metals, extraction of metals and reduction reactions; electrochemical cells including a non-metal electrode; reactions of metals — electrons flow, redox reaction, oxidation, reduction, fuel cells and rechargeable batteries

Salt and Battery - Use of fruit juices and different metal electrodes to investigate electrochemical cells.

 

properties of plastics — addition and condensation polymerisation including polythene and polyesters; representation of the structure of monomers and polymers, natural polymers

Gloopy and gooey (Demo) - two experiments: Gaviscon in copper sulphate and PVA/Borax, both cross-linking polymers cross-linking polymers

Plastic Fantastic - Synthesis and testing of an electrically conductive plastic - polypyrrole

Latex cross-linking - Some simple reactions involving the cross-linking of latex solution to form rubber balls, rubber bands and foam rubber.

 

fertilisers — the Haber process, commercial production of nitrate fertilisers, percentage mass compositions of fertilisers

 

nuclear chemistry — radiation process, alpha, beta and gamma radiation; specific properties mass, charge and ability to penetrate different materials; nuclear equations; uses of radioactive isotopes; half-life; use of isotopes to date materials

 

chemical analysis —techniques for monitoring the environment and methods for reducing pollution and titration with calculations

Flame colours (Demo) - Using atomiser bottles (and other methods) for flame tests. (can perhaps be done as a class experiment)

Water analysis - a series of different experiments for the analysis of various ions in water.

 

 

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