What are Ores?

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What are Ores? Most metals are too to exist
on their own in the ground. Instead they exist
combined with other elements (typically o.. or
sulphur) as .. called . A few metals
are so .. that they exist uncombined, as
.metals e.g. gold, ..
Metal Name of ore Compound in ore
Aluminium Bauxite Aluminium oxide (Al2O3)




Words ores silver reactive oxygen compounds un
reactive pure
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Displacement Reactions
1. Iron Copper Sulphate ?
Iron Sulphate Copper
2. Copper Silver Nitrate ?
Copper Nitrate Silver
3. Sodium Zinc Carbonate ?
Sodium Carbonate Zinc
4. Potassium Iron Oxide ?
Potassium Oxide Iron
5. Gold Copper Carbonate ?
Gold Copper Carbonate
No reaction! Can you figure out why?
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How do we extract metals from ores?
Watch this video clip http//jchemed.chem.wisc.e
du/JCESoft/CCA/samples/cca7thermite.html

• It is called the thermite reaction.
• The symbol equation is Fe2O3 Al ? Al2O3
  Fe
• Copy out the symbol equation and write the word
  equation underneath.
• Why does this reaction happen?
• Do you think that its a commercially viable way
  of extracting iron from its ore? Explain your
  answer.

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So how is it done?
Potassium Sodium Magnesium Aluminium
The reactivity series of metals
Carbon (not a metal)
Zinc Iron Copper Silver Gold
Carbon can be used to extract some metals from
their ores e.g. Copper oxide Carbon ? Copper
Carbon dioxide The copper oxide has lost oxygen.
This is called a reduction reaction.
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Potassium Sodium Aluminium Carbon Zinc Iron Copper
Silver Gold
Extracted from their ores by electrolysis (using
electricity)
Extracted from their ores by reduction by carbon
No extraction necessary found pure in the
ground.