Summary Edexcel iGCSE Chemistry Revision Notes on Paper 2
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Course
Chemistry
Institution
GCSE
I used this document in my GCSE revision and it helped me to achieve a Grade 8 in my final chemistry GCSE exam (edexcel igcse board). These notes are made based on the CGP GCSE guide.
METALS AND REDOX
Oxidation :
gain of Oxygen Extraction of metals
Magnesium is oxidised to the more reactive ,
the harder it is to extract the metal .
magnesium oxide ·
many common metals (e g .
- iron , aluminium) from
2Mg +
02 -
>
2MgO metal oxide ores
↳ the metal can be separated by its oxide using a
Reduction : loss of oxygen reduction reaction
copper oxide is reduced to Carbon can be used as a reducing agent to separate
copper using carbon the oxygen (but not all
2u0 + c - 2Cu +
CO2
the reactivity series ·
Only metals less reactive than carbon can
·
MOSt
K be extracted via a reduction reaction
reactive
Na ↳ this is done by heating the one with
Ca carbon monoxide
E g
. iron Oxide is reduced in a blast furnace
My
.
to make iron
Carbon C ↳ because more reactive metals form compounds
·
2n readily
Fl carbon can only take the oxygen away from
Su metals that are less reactive than itself
Cu
Lunc
elements
(
s
Gold As iden
isus ectcyto separatetee una
USES OF METALS
The properties of pure metals :
properties that iron , copper and pure metals are often too soft for everyday life
aluminium : Alloy : a mixture of different metals (and/or
dense and shiny Carbon(
·
high meeting points >
↳
different elements =
different size atoms : these
Ciron s coppers aluminium distort the regular layers of metal atoms
,
·
high tensile Strength (strong +
making it more difficult for them to slide
hard to break over each other .
good conductors of electricity ↳ alloys are harder
/ stronger than pure metals
(and heat)
uses of iron , copper and aluminium :
IRON : COPPER
wrough iron is iron
pure good conductor of heat and electricity
·
malleable ↳ used in electrical components due to its
↳ used for gates and railings low resistance
DIS : Corrodes Crusts
easily ↳ used in
heating systems (underfloor etc
ALUMINIUM ALUMINIUM CONT
·
does not corrode easily ↳ used products that come
in in contact with
reacts quickly with Oxygen Water (e . fizzy drinks
g
·
.
↳ forms a protective layer of aluminium ↳ used in bicycle frames and aeroplanes
oxide on the aluminium below (where weight is important
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