gcse core chemistry similarities & differences exam tip; you must know both the similarities...

GCSE Core Chemistry

Exam tip; You must know BOTH the similarities & similarities & differencesdifferences between Aluminium and Titanium

Key words; displacement, oxide layers, recycling

GCSE Core Chemistry


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.

GCSE Core Chemistry


UNLUCKY DIP?UNLUCKY DIP?

Take from my bag…If you dare!

Send 1 brave soul to pick Send 1 brave soul to pick something from the bag something from the bag of death. As a group find of death. As a group find as much information as as much information as you can as you will be you can as you will be

describing it to everyone describing it to everyone elseelse

Al and Ti have a lower density than Al and Ti have a lower density than most metals and are resistant tomost metals and are resistant to

corrosion with Titanium being strong corrosion with Titanium being strong at high temperatures.at high temperatures.

Extracting these materials areExtracting these materials areexpensive as it requires electrolysis.expensive as it requires electrolysis.

Recycling saves resources & Recycling saves resources & the energy needed to extract the energy needed to extract

the metal from its ore.the metal from its ore.

GCSE Core Chemistry


DEMONSTRATION

Add Aluminium powder into a bunsen flame.

Describe what happens

Write the word equation

Write a balanced chemical equation

Is it magic????

GCSE Core Chemistry


Aluminium powder + Oxygen gas (forms) Aluminium oxide

4Al + 3O2 (forms) 2Al2O3

GCSE Core Chemistry


coating of oxygen 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.

Aluminium is a very reactive metal. However, it does not corrode in the presence of oxygen. Why is this?

oxygen in the atmosphere

aluminium atoms

GCSE Core Chemistry


Use p48-51 to 1. Prepare a table listed the similarities & differences

of the 2 metals.2. Link specific properties of Al and Ti to their uses. 3. Consider environmental issues such as recycling

NOTE: We should recycle metals because NOTE: We should recycle metals because extracting them uses limited resources and is extracting them uses limited resources and is expensive in terms of energy and effects on the expensive in terms of energy and effects on the environment for example the multi-stage process environment for example the multi-stage process involved in extracting metals such as titanium. involved in extracting metals such as titanium.

GCSE Core Chemistry


Aluminium & Titanium Metal

• Soft with low mp• Can be hardened by

alloying• Extracted by

electrolysis• Used in buildings,

cans, cooking foil, electricity cables, aircraft

• Reacts with C so is extracted by displacement

• Used in jet engines, nuclear reactors, replacement hip joints, bicycles

GCSE Core Chemistry


I went down to the shop today I went down to the shop today andand

I bought…I bought…

Homework sheet:

Using Metals

GCSE Core Chemistry


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.

gcse core chemistry similarities & differences exam tip; you must know both the similarities...

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