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5173279
C1.3 Metals and their uses
Descrição
GCSE Chemistry Mapa Mental sobre C1.3 Metals and their uses, criado por ELeanor Turner em 18-04-2016.
Sem etiquetas
chemistry
gcse
aqa
triple science
chemistry unit 1
c1
additional science
gcse chemistry
science
revision
chemistry
gcse
Mapa Mental por
ELeanor Turner
, atualizado more than 1 year ago
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Criado por
ELeanor Turner
aproximadamente 8 anos atrás
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Resumo de Recurso
C1.3 Metals and their uses
Extracting metals
Ores
Contain enough metal to make it economical
Mined
Metals found as compounds
Require chemical reactions to extract the metal
Less reactive than carbon
Reduction with carbon
Aluminium and Titanium cannot be extracated this way
More reactive than carbon
Electrolysis of molten compounds
Large amounts of energy
Expensive
Copper
Smelting
Heating the copper ores in a furnace
Then purified by electrolysis
Phytomining or Bioleaching
Phytomining- plants absorb metal
Plants are burned
Ash contains metal compounds
Bioleaching- bacteria produces leachate solutions
Contain metal compounds
Electrolysis
Solutions of copper salts
Displacement with scrap iron
Expensive
Many stages
Large amounts of energy needed
Should recycle metals
Alloys
Harder than pure metals
Pure metals often too soft for many uses
Different metals have different atom sizes, distort the layers making it harder to slide over each other
Impure iron is brittle
Iron is converted into steel
Steel is a mixture of iron and carbon
Low-carbon steels are easily shaped
High-carbon steels are hard
Stainless steels are resistant to corrosion
Properties and uses of metals
Transition metals
Good conductors of heat and electricity
Can be bent and hammered into shape
Good as structural materials
Good for things that require conduction of heat and electricity
Copper
Useful for plumbing and wiring
Good conductor of heat and electricity
Can be bent enough to make tanks
Does not react with water
Aluminium and titanium
Low density and resistant to corrosion
Useful metals
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