Magic Metals Aluminium & Titanium

1. Magic Metals Aluminium & Titanium Key words; displacement, oxide layers, recycling

2. Learning Objectives: • That aluminium and titanium are useful metals. • That extracting aluminium and titanium is costly. • Some reasons for recycling aluminium. I will be successful if I can: • List the useful properties of aluminium and titanium. •Recall the methods of extraction used for aluminium and titanium. • List reasons for the importance of aluminium recycling. • Give examples of uses of aluminium and/or titanium and explain which properties makes them fit for purpose. • Describe why the extraction of aluminium and titanium is costly. • Explain the benefits, in terms of social, economic and environmental benefits of aluminium recycling.

3. starter UNLUCKY DIP? Al and Ti have a lower density than most metals and are resistant to corrosion with Titanium being strong at high temperatures. Extracting these materials are expensive as it requires electrolysis. Recycling saves resources & the energy needed to extract the metal from its ore. Take from my bag…If you dare! Send 1 brave soul to pick something from the bag of death. As a group find as much information as you can as you will be describing it to everyone else

4. DEMONSTRATION Add Aluminium powder into a bunsen flame. Describe what happens Write the word equation Write a balanced chemical equation Is it magic????

5. Aluminium powder + Oxygen gas (forms) Aluminium oxide 4Al + 3O2 (forms) 2Al2O3

6. Aluminium is a very reactive metal. However, it does not corrode in the presence of oxygen. Why is this? oxygen in the atmosphere coating of oxygen atoms aluminium atoms The outer aluminium atoms react with oxygen in the atmosphere. This forms a thin layer of aluminium oxide on the metal’s surface, which protects the metal from corrosion.

7. Use p48-51 to Prepare a table listed the similarities & differences of the 2 metals. Link specific properties of Al and Ti to their uses. Consider environmental issues such as recycling NOTE: We should recycle metals because extracting them uses limited resources and is expensive in terms of energy and effects on the environment for example the multi-stage process involved in extracting metals such as titanium.

8. Soft with low mp Can be hardened by alloying Extracted by electrolysis Used in buildings, cans, cooking foil, electricity cables, aircraft Aluminium & Titanium Metal • Reacts with C so is extracted by displacement • Used in jet engines, nuclear reactors, replacement hip joints, bicycles

9. plenary I went down to the shop today and I bought… Homework sheet: Using Metals

10. Learning Objectives: • That aluminium and titanium are useful metals. • That extracting aluminium and titanium is costly. • Some reasons for recycling aluminium. I will be successful if I can: • List the useful properties of aluminium and titanium. •Recall the methods of extraction used for aluminium and titanium. • List reasons for the importance of aluminium recycling. • Give examples of uses of aluminium and/or titanium and explain which properties makes them fit for purpose. • Describe why the extraction of aluminium and titanium is costly. • Explain the benefits, in terms of social, economic and environmental benefits of aluminium recycling.