1. Aluminium and Titanium

2. Learning Objectives
To be able to recall properties and uses of aluminium and titanium
To be able to describe the process of aluminium extraction
To be able to explain why the extraction of aluminium and titanium are so expensive

3. Starter Activity – Key Word Bingo
Reduction
Reactivity Series
Ore
Electrolysis
Carbon
Hydrogen
Native State
Haematite
Bauxite
Alloy
Blast Furnace
Steel

4. Al2O3 – Bauxite (Aluminium oxide)
What is the chemical name for Bauxite?
How many elements are in Bauxite- name them?
How many atoms in Bauxite?
How is Bauxite bonded? (Ionic, Covalent or Metallic)
What do we call compounds such as Bauxite, where there is a decent amount of the metal to make it worth extracting?
5 minutes

5. Extraction of Aluminium
We extract aluminium using electrolysis as it is more reactive than carbon
An electric current is passed through MOLTEN aluminium oxide at high temperatures to break it down
Electrolysis is very expensive
High temperatures are required so a great deal of electricity is required
Environmental issues arise due to the amount of energy required
Referring to the reactivity series, how do we extract aluminium?

6. Extraction of Titanium
We can displace it from its oxide using carbon, it reacts with titanium making it very brittle
Therefore we use a more reactive metal for extraction, Sodium or Magnesium
However sodium and magnesium have to be extracted using electrolysis
Before titanium displacement can occur, titanium oxide is converted to titanium chloride
Chloride is distilled to purify it, then titanium can be displaced using sodium or magnesium
This is a very costly process due to all the steps
Titanium is not a very reactive metal, how do you think we extract this?

7. Video Highest recycling potential of all recyclable materials
Video
Highest recycling potential of all recyclable materials
1kg of recycled Aluminium saves 8kg of bauxite, 4kg chemical products, 14 kilowatt-hours electricity
Recycling 1 aluminium can will run a TV for 3 hours
Recycling rate of 90%
Watch the video and write down key data relating to the recycling of aluminium

8. Question 5 set Exam Questions (You may need a textbook)
Activity
Complete ‘Uses and Properties’ Worksheet
Produce a PERSUASIVE poster encouraging people to recycle aluminium
EXTENSION
Question 5 set Exam Questions
(You may need a textbook)

9. Plenary Sort into Aluminium and Titanium
Bicycles
Racing Bikes
Replacement Joints
Drinks Cans
Saucepans
Jet Engines
Aeroplanes
Cooking Foil
High Performance Aircrafts
Nuclear Reactors