A rock with enough metal to make it economically worth extracting
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What makes a metal worth extracting
how easy it is to extract and how much the ore contains
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How do you extract metals above carbon
electrolysis
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How do you extract metals less reactive than carbon
reduction using carbon coke or charcoal
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which metals occur native
gold, silver and copper
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what is reduction
taking oxygen away
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What is the equation for the reduction of copper oxide
CuO + C =2Cu +CO2
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What is electrolysis
get a metal ore, melt it then pass electricity through the liquid to split up the compound
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What is steel
a mixture of iron and carbon
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How do you make carbon steel
remove most of the carbon from cast iron
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uses of carbon steel
cars, knives, machinery, containers
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Propertes of high carbon steel
high carbon content, strong but brittle
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properties of low carbon steel
soft, easily shaped, not storng, less likely to shatter
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What is mild steel
low carbo steel with 0.1% carbon, useful for mass production
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Low alloy steels
more expensive than carbon steel, contain 1% to 5% of other metals
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high alloy steel
high percentage of other metals
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Properties of chronium nickel steels and stainless steel
used for cutlery and chemical reaction vessels, hard, strong, resistant to corrosion, don't rust
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What is the chemical symbol for iron oxide
Fe2O3
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what is the cheapest substance we use to push iron out of iron oxide
carbon
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properties of aluminium
strong, light, conducts electricity and doesn't rust
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why doesn't alumium rust
it forms a layer of aluminium oxide on its surface so water or oxygen cant react with it
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uses of aluminium
cans, aeroplanes, electricity cables
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how do you extract aluminium
electrolysis
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properties of titanium
strong, light, doesn't rust, expensive to extract
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uses of titanium
aircrafts , racing bikes, replacement hips, parts of jet engines
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Why can't titanium be displaced with carbon
they react
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what do we use to get titanium from it's oxide
sodium or magnesium but they have to be extracted by electrolysis
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How do we get titanium from it's ore
titanium oxide is seperated and converted to chloride, the chloride is distilled and then the titanium is displaced by sodium or magmesium
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What are the issues of extracting titanium
multi stage, lots of energy, need an atmosphere of argon
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how do you extract copper with acid
add it to a low grade ore to make a solution
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explain phytomining copper
grow plants on low grade ore, chop the plants down and burn them
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explain bioleaching copper
bacteria feed on ore, usinf biological and chemical processes we get a solution of copper ions, use scrap irn and electrolysis to extract copper from it
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Explain extracting copper using electrolysis
you pass electricity through CuSO4 solution and the copper forms at the negative electrode because Cu 2+is positive
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Other cards in this set
Card 2
Front
What makes a metal worth extracting
Back
how easy it is to extract and how much the ore contains
Card 3
Front
How do you extract metals above carbon
Back
Card 4
Front
How do you extract metals less reactive than carbon
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