Nature's Chemistry (N4)
The key areas covered in this Unit are:
fuels — formation and extraction processes for crude oil; the use of fuels and their environmental impact on the carbon cycle, and alternative energy sources including biomass
Dynamite soap (Demo) - exploding bubbles of hydrogen and oxygen produced by electrolysis of water.
Methane bubbles (Demo) - Preparing and igniting bubbles of methane.
Piezo rockets (Demo) - preparing and firing mini pipette rockets containing hydrogen (or possibly another flammable gas)
Whoosh bottle (Demo) - Ignition of alcohol vapour in a 15l water bottle to produce a spectacular 'whoosh'.
Dye Sensitised Solar Cells: An activity to show generation of electricity from plant pigments.
hydrocarbons — fractional distillation and cracking, straight chained alkanes (C1–C8), alkenes (C2–C8), their physical, chemical properties, general formulae, structural formulae and uses; unsaturated and saturated hydrocarbons
Cracking - microscale - A microscale version of the cracking experiment producing smaller hydrocarbons from paraffin oil
everyday consumer products — alcoholic drinks: sources and production, units in drinks and health issues, analysis of carbohydrates, Benedict’s and iodine solutions; solubility of carbohydrates; competing demands for carbohydrates as food or fuel
Screaming Jelly Baby - The classic demonstration to show the energy that is contained in sugars.
plants to products — practical-based activity on products derived from plants which have enhanced everyday life
Shampoo: Activity to make shampoo, involving steam distillation to extract natural essences from plants
Lip Balm: Activities researching and then making lip balms using many plant-based products.
Flash Chromatography; can be used to separate samples of food dyes (pure samples or extracted from sweets) or plant pigments.
Vitamin C Drops: Ascorbic acid is added to many doods as a preservative. This easy practical estimates the content in a variety of fruit juices.
Biodiesel: An investigation into the production and testing of Biodiesel from vegetable oil