Core Chemistry Chapter 3 AQA

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What is an ore
A rock that contains a metal/metal compound
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1 way metals can be extracted
Displacement using a more reactive element
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What takes place in a reduction reaction
Carbon removes oxygen from the oxide to produce metal
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Another way metals can be extracted
Metals less reactive than carbon are can be extracted from oxides by heating with carbon
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What do we call the removal of oxygen from metal oxides
Reduction reaction
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Name two metals can be oxides that can be reduced by carbon
Rocks from which metal can be extracted economically
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How can iron oxide be reduced
At high temps in a blast furnace using carbon
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How much iron does it contain and what properties does it have
96% cast iron and impurities make it hard and brittle
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How do you make pure iron
Removing all carbon and other impurities
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Why does iron from the blast furnace only have a few uses
It is brittle
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What are steels
Steels are alloys of iron because they are mixtures of iron and carbon
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One difference between low carbon/high carbon steels
LCS are easily shaped, HCS are hard
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Why are steels more useful than pure iron
They are harder, can be made to resist corrosion
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3 properties of aluminium
Low density, resistant to corrosion, More reactive than carbon o oxidde can not be reduced using carbon
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How is aluminium extracted
Extracted by electrolysis of molten aluminium oxide. Requires high temps and lots of electricity
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Why is it expensive to extract aluminium from its ore
Requires high temps and lost of electricity
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3 properties of titanium
Resistant to corrosion, very strong, Low density. Can be reduced by carbon , but metal reacts with carbon making it brittle
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How is titanium extracted
From its ore by process that involves seveal stages and lots of energy. Expensive
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Why is titanium a very useful metal for making aircraft engines
Strong, resists corrosion, has low density
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1 way copper can be extracted
By smelting, heating the ore strongly in a furnace
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What does smelting produce and what does it require
produces impure copper - requires huge amounts of heating and electricity
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What is phytomining
Uses plants to absorb copper compounds from the ground. Plants are burned and produce ash from which copper can be extracted
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What is bioleaching
Uses bacteria to produce solutions containing copper compounds
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What are 3 ways can be used to produce copper metal from its compounds
Smelting, electrolysis, displacement
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What are transition metals
Elements from central block of periodic table, all good conductors of heat and electricity
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What properties make transition metals useful materials for making things
Good conductors of heat/electricity, csn be bent/hammered into shape
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What properties are needed for electrical wiring
Good conducto of electiricy, bent into shape
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Why is gold used for wedding rings mixed with other metals
To make it harder
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4 benefits of using metals in construction
They are strong, Can be bent into shape, Can be made into flexible wires, Good electrical conductors
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3 drawbacks of using metals in construction
Iron/steel can rust, Metals more expensive than other materials - concrete, Obtaining metals from ore causes pollution and uses limited resources
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Why should we recycle aluminium cans
To save the energy needed to extract it from its ore, fossil fuels
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Other cards in this set

Card 2

Front

1 way metals can be extracted

Back

Displacement using a more reactive element

Card 3

Front

What takes place in a reduction reaction

Back

Preview of the front of card 3

Card 4

Front

Another way metals can be extracted

Back

Preview of the front of card 4

Card 5

Front

What do we call the removal of oxygen from metal oxides

Back

Preview of the front of card 5
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