Extraction of Metals
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Extraction by electrolysis | potassium, sodium, calcium, magnesium, aluminium
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| Extraction by reducing agent-carbon/carbon monoxide | zinc, iron, lead
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| What’s in the charge? | Iron ore (haematite = iron oxide and sand), limestone (mainly Calcium Carbonate), Coke (almost pure carbon)
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| Stage one: Reactions in the blast furnace | Coke burns, giving off heat, C + O2 = CO2
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| Stage two: Reactions in the blast furnace | Carbon monoxide is made, C + CO2 = 2CO
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| Stage three: Reactions in the blast furnace | Iron oxide is reduced, Fe2O3 + 3CO = 2Fe + 3CO2
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| Limestone is for? | reacting with silica, to remove impurities from the haematite, slag at the top is drained off
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| Waste gases? | CO2 and Nitrogen
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| Extracting Aluminium | bauxite to alumina/white aluminium oxide to electrolysis to usage
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| Electrolysis of Aluminium | Alum. gains electrons at the cathode whilst, at the anode, the oxygen loses electrons
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