Chemistry C1 3.3 Aluminium and titanium.

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What are the properties of aluminium and titanium?
They resist corrosion and they have low densities compared with other strong metals.
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How can aluminium be extracted from its oxide?
Aluminium is more reactive than carbon and so its oxide cannot be reduced using carbon, it has to be extracted by electrolysis of molten aluminium oxide.
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How is aluminium expensive to extract?
It has to be extracted by electrolysis of molten aluminium oxide and this process requires high temperatures and a lot of electricity.
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What is the difference between pure aluminium and aluminium alloys?
Pure aluminium is not very strong, but aluminium alloys are stronger and harder and have many uses.
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Why can't titanium be extracted from its oxide using carbon?
Titanium oxide can be reduced by carbon, however the metal reacts with carbon making it brittle.
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How is titanium extracted?
Titanium is extracted from its ore by a process that involves several stages and large amounts of energy, the high costs of the process make titanium expensive.
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Are aluminium and titanium extracted from their oxides using carbon?
No.
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Why are aluminium and titanium expensive to extract?
Extracting them involves many stages and requires large amounts of energy.
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Why is it expensive to extract aluminium from its ore?
It requires a lot of energy for high temperatures and electricity.
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Why is titanium a very useful metal for making aircraft engines?
It is strong, resists corrosion, has a low density.
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Why is titanium a very useful metal for making aircraft engines?
It is strong, resists corrosion, has a low density.
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Card 2

Front

How can aluminium be extracted from its oxide?

Back

Aluminium is more reactive than carbon and so its oxide cannot be reduced using carbon, it has to be extracted by electrolysis of molten aluminium oxide.

Card 3

Front

How is aluminium expensive to extract?

Back

Preview of the front of card 3

Card 4

Front

What is the difference between pure aluminium and aluminium alloys?

Back

Preview of the front of card 4

Card 5

Front

Why can't titanium be extracted from its oxide using carbon?

Back

Preview of the front of card 5
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