ttt786
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I dont understand 'getting metals from rocks' and electroloysis
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*SweaterWeather*
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(Original post by ttt786)
I dont understand 'getting metals from rocks' and electroloysis
Extracting Metals
Ores - Metal ores contain enough of the metal to make it economically viable to extract.
After an ore is mined, it has to be extracted then purified.
If a metal is LESS reactive than carbon, it can be extracted by reduction with carbon (eg Iron Oxide is reduced in the Blast Furnace to make Iron)
If a metal is MORE reactive than carbon, it can be extracted by electrolysis of the molten compounds (but this uses lots of energy so is expensive)

Extracting Copper
Smelting is where copper is extracted from copper rich ores by heating the ores in a furnace.(Copper Sulphate + Oxygen --> Copper + Sulphur Dioxide)

The Copper Sulphate method is where Sulphuric Acid is added to a copper ore to produce Copper Sulphate, and the copper is then extracted by electrolysis or displacement.

Phytomining is where plants absorb copper ions from low-grade ore, then are burned and the copper ions dissolved by adding Sulphuric Acid, then pure copper can be extracted.

Bioleaching is where bacteria feed on low-grade ore and produce a waste product containing copper ions that can be used to extract pure copper.

Iron
Iron ore is iron combined with oxygen, so can be extracted with a Blast Furnace and carbon, as carbon reduces the Iron Oxide into Iron and Carbon Dioxide.

I think electrolysis is in Unit 2, so we dont need it for the upcoming exam
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ttt786
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(Original post by *SweaterWeather*)
Extracting Metals
Ores - Metal ores contain enough of the metal to make it economically viable to extract.
After an ore is mined, it has to be extracted then purified.
If a metal is LESS reactive than carbon, it can be extracted by reduction with carbon (eg Iron Oxide is reduced in the Blast Furnace to make Iron)
If a metal is MORE reactive than carbon, it can be extracted by electrolysis of the molten compounds (but this uses lots of energy so is expensive)

Extracting Copper
Smelting is where copper is extracted from copper rich ores by heating the ores in a furnace.(Copper Sulphate + Oxygen --> Copper + Sulphur Dioxide)

The Copper Sulphate method is where Sulphuric Acid is added to a copper ore to produce Copper Sulphate, and the copper is then extracted by electrolysis or displacement.

Phytomining is where plants absorb copper ions from low-grade ore, then are burned and the copper ions dissolved by adding Sulphuric Acid, then pure copper can be extracted.

Bioleaching is where bacteria feed on low-grade ore and produce a waste product containing copper ions that can be used to extract pure copper.

Iron
Iron ore is iron combined with oxygen, so can be extracted with a Blast Furnace and carbon, as carbon reduces the Iron Oxide into Iron and Carbon Dioxide.

I think electrolysis is in Unit 2, so we dont need it for the upcoming exam
Thank you
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