Metal extraction- chemistry unit two

Hey guys

Here are a few revision cards to test yourself on metal extraction

Hope it helps

:)

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What type of ores are metals usually found in?
Oxide or sulphide ores
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How are oxides formed from sulphides?
By roasting in air
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What are the conditions for extracting iron?
Blast furnace and a high temperature of around 1200 degrees
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What is the limitation of using carbon as a reductant?
A carbide can be formed instead of the pure metal e.g. TiC
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Can aluminium be extracted using carbon?
No because aluminium is more reactive than C so can't be displaced/reduced
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What is the electrode equation for aluminium?
Al3+ + 3e- ---> Al
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What is the risk of using hydrogen for extraction?
It is an explosive gas
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What can SO2 be used to produce?
Sulphuric acid
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What does aluminium have to be dissolved in before being electrolysed?
Cryolite
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What is the anode made of in aluminium electrolysis?
Graphite
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Why does the anode in electrolysis have to be replaced frequently?
Because it contains carbon which when reacted with oxygen produces carbon dioxide which then escapes as a gas
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Other cards in this set

Card 2

Front

How are oxides formed from sulphides?

Back

By roasting in air

Card 3

Front

What are the conditions for extracting iron?

Back

Preview of the front of card 3

Card 4

Front

What is the limitation of using carbon as a reductant?

Back

Preview of the front of card 4

Card 5

Front

Can aluminium be extracted using carbon?

Back

Preview of the front of card 5
View more cards

Comments

Moonman

this has made me realise how much I need to revise

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