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stainless steel
contains
properties
uses
>10% chromium
doesn't rust
cutlery/sinks
reducing agent in blast furnace, because
carbon monoxide - has brought about reduction of iron oxide - it has been oxidised
Fe2O3 + 3CO → 2Fe + 3CO2
cathode electrolysis
Al3++ 3e- → Al
reduction
because Al3+ gains electrons
positive anode electrolysis
2O2- → O2+ 4e-
oxidation
oxygen ion is losing electrons
metals below carbon? extracted by?
zinc
iron
copper
DISPLACEMENT WITH C OR CO
Metals above carbon are? extracted by?
Potssium
sodium
lithium
calcium
magnesium
aluminium
ELECTROLYSIS
low carbon steel
contains
properties
uses
<0.3% carbon
easily shaped
car body panels/domestic goods
high carbon steel
contains
properties
uses
1-2% carbon
hard
cutting tools
electrolysis
why is aluminum mixed with cryolite?
lowers melting point
reduces operating risk
copper
properties
uses
conducts electricity → domestic wires
won't react with water → plumbing pipes
blast furnace- limestone is used to
reacts with impurities in ore, forms slag(waste product)
BLAST FURNACE - IRON ORE
what is being reduced, because
iron oxide - it has lost oxygen
Fe2O3 + 3CO → 2Fe + 3CO2
an ore is
a rock that contains a sufficient amount of a metal compound to make it economically viable to extract the metal
an alloy is, makes it harder because
a mixture of a metal with with atoms of other elements
the different sized atoms introduced into the metal disrupt the regular layers of metal ions + therefore stop them from sliding over each other
aluminium
properties
uses
low density, malleable, unreactive -----> drink cans
durable, low density -----> aircraft bodies