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Metals
Nat 5
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Name a metal found un
combined in the Earth’s crust.
Gold, silver or copper.
Give a property of metals.
Ductile
Strong
Malleable
Conducts heat
Conducts electricity
Which metal is extracted from
it’s ore in a Blast Furnace?
IRON
What is produced when metal
reacts with oxygen?
Metal oxide
Name a metal obtained from its
ore by electrolysis?
Mg, Al, Na, K, Li
Name the products of the
reaction between zinc and
sulphuric acid.
Zinc Sulphate + Hydrogen
Name the products of the
reaction between sodium and
water.
Sodium Hydroxide + Hydrogen
What is an alloy?
Mix of difference metals or a mix of metals
and non metals.
Which type of reaction takes
place when a metal is extracted
from its compound (ore)?
Reduction
Identify the two alloys from the
list: brass, iron, copper and
steel.
Brass and Steel .
Calculate the percentage mass
of potassium in potassium
sulphide.
gfm K = 39 G
Gfm K2S = 2 x 39 + 32 = 110
% mass= (39/ 110) x 100 =
35.5 %
Name a metal which does NOT
react with dilute acid
Gold, silver or copper.
What is the name of group 1
metals?
Alkali Metals .
What is a displacement reaction ?
A metal high in the electrochemical series
displaces ( takes its place) ions of a metal
lower in the series from it solution.
Is this ion electron equation an
example of reduction or
oxidation?
2+
Cu
+ 2e
Cu
Reduction.
Is this ion electron equation an
example of reduction or
oxidation?
2Cl
Cl2 + 2e
Oxidation
Electricity is the flow of ?
Electrons .
Why do batteries run out?
The chemicals get used up.
State an advantage of batteries
over mains electricity
Batteries are portable.
What is the purpose of the ion
(salt) bridge?
To complete the circuit.
What is the relationship between
the position of metals in the
electrochemical series and the
voltage of a cell?
The further away they are from each other
the larger the voltage.
What is the purpose of an
electrolyte?
To complete the circuit.
What directions will the
electrons flow in a zinc / copper
cell?
Zinc to Copper.
What is oxidation?
Loss of electrons.
What is reduction?
Gain of electrons.
Name the type of chemical
reaction taking place.
Mg + CuCl2
Cu + MgCl2
Displacement.
What is corrosion?
A chemical reaction involving metals
changing from element to a compound.
What are the two conditions
required for rusting to take
place?
Water and oxygen.
What type of reaction takes
place when a metal corrodes?
Oxidation
How can you test to see if Iron
has corroded?
Will change from an element to an ion, Fe 2+
and Fe 2+ can be detected as it turns Ferroxyl
indicator blue.
Which terminal of a battery
protects iron from rusting?
Negative
Why does salt speed up
corrosion?
As salt is an electrolyte.
How does a physical barrier
protect iron against rusting?
Prevents water and oxygen ( air).
What metal is used to galvanise
Iron?
Zinc
Why does scratched tin plated
iron rust faster then non –
plated iron?
Electrons flow from Iron to Tin because Tin
is below Iron in the electrochemical series.
Magnesium provides Iron with
sacrificial protection. In which
direction do electrons flow?
From Magnesium to Iron.
Give examples how Iron can be
physically protected?
Layer of Paint
Layer of Grease
Layer of plastic
Tin plating
Electroplating
Galvanising