C1 Metals and electrolysis

what is an ore
a rock which contains enough metal to make it worthwhile extracting the meal from it
1 of 58
what is bauxite and the formula
the main aluminium ore containing aluminium oxide Al2O3
2 of 58
why does the economics of metals change
if the metal isnt worth as muh its not worthwhile to extract it
3 of 58
how are metals extracted from their ore
extracted chemically by reduction or electrolysis
4 of 58
how does reduction with carbon work
it is reduced meaning oxygen is removed, method can only be used if the metal is below carbon in the reactivity series
5 of 58
when is electrolysis used
when metals are higher than carbon in the reactivity series
6 of 58
disadvantage of electrolysis compared to reduction
7 of 58
why is copper electrolysed even though its less reactive than carbon
because the copper produced is very impure and impure copper doesnt conduct electricity so electrolysis is used to purify it
8 of 58
what does electrolysis mean
splitting up with electricity
9 of 58
what does OIL RIG stand for and what does it mean
Oxidation Is Loss, Reduction Is Gain (of electrons)
10 of 58
what does the electrolyte need to contain and why
free ions which conduct the electricity completing the circuit
11 of 58
the half equation for the anode
2H+ + 2e- = H2
12 of 58
the half equation for the cathode
2Cl- = Cl2 + 2e-
13 of 58
3 basic steps of electrolysis
electrons are pulled off the anode causing them to go into the solution as ions, the ions near the cathode gain electrons and turn back into their atoms
14 of 58
what is the sludge formed from in the process of electrolysing impure copper to get pure copper
the impurities that are dropped
15 of 58
how does displacement work
the more reactive metal will replace the less reactive metal in a solution of a dissolved metal compound because the more reactive metal bonds more strongly to the non-metal bit of the compound and pushes out the less reactive metal
16 of 58
why is it good to be able to use iron to displace copper in copper sulfate solution
copper is more valuable than iron
17 of 58
copper rich supplies are .... so it's important that we ....?
limited ...... recycle as much copper as possible
18 of 58
the demand for copper is ... which may lead to ... in the ...?
growing ... shortages ... future
19 of 58
two ways of extracting copper from low grade ores
bioleaching & phytomining
20 of 58
what is bioleaching
using bacteria to separate copper from copper sulfide
21 of 58
how does bioleaching work
the bacteria get energy from the bond between copper and sulfur, separating out the copper from the ore in the process. the leachate contains copper which can be extracted by filtering
22 of 58
what is a leachate
the solution produced by the process
23 of 58
what is phytomining
growing plants in soils that contain copper
24 of 58
how does phytomining work
the copper builds up in the plants leaves so they are dried and burned in a furnace which leaves the copper
25 of 58
pro and con of these methods
better for environment than previous methods, very slow
26 of 58
4 pros to mining
useful products can be made, provides jobs, brings money to area, local services eg transport can be improved
27 of 58
4 cons to mining
noise pollution, landscape scarring, loss of habitats, abandoned mine shafts are dangerous
28 of 58
4 properties of generic metals
strong, malleable, good at conducting heat, good at conducting electricity
29 of 58
why is copper good for wires
good conductor of electricity, hard and strong but can still be bent, doesnt react with water
30 of 58
use for aluminium
make into planes
31 of 58
why would you use aluminium for this
strong malleable but also light
32 of 58
properties of aluminium
corrosion-resistant, low density
33 of 58
use for titanium
replacement hips
34 of 58
why would you use titanium for this
doesnt corrode when in contact with water, light and not too bendy
35 of 58
properties of titanium
low density, very strong, corrosion-resistant
36 of 58
how do you protect a metal from corrosion
paint them
37 of 58
what are metals exposed to when they corrode
air, water
38 of 58
what is it called when metals get tired from stress
metal fatigue
39 of 58
why is this dangerous
leads to metals breaking
40 of 58
how do alloys strengthen metals
the mixture of different sized atoms distort the regular arrangement of a pure metal making it difficult for layers to slide over eachother
41 of 58
what is low carbon steel made of
0.1% of carbon
42 of 58
low carbon steel properties
easily shaped
43 of 58
low carbon steel is used for
car bodies
44 of 58
what is high carbon steel made of
1.5% carbon
45 of 58
high carbon steel properties
very hard, inflexible
46 of 58
high carbon steel is used for
blades for cutting tools, bridges
47 of 58
stainless steel is made of
iron, carbon and chromium SOMETIMES nickel
48 of 58
property of steel
corrosion resistant
49 of 58
uses of steel
cutlery, containers for corrosive substances
50 of 58
how is bronze made
copper and tin
51 of 58
uses of bronze
making medals and statues
52 of 58
properties of bronze
harder than copper
53 of 58
how is cupronickel made
copper and nickel
54 of 58
uses of cupronickel
to make silver coins
55 of 58
properties of cupronickel
hard and corrosion-resistant
56 of 58
what is gold jewellery made from
gold and zinc; copper; silver; palladium; nickel
57 of 58
what are aeroplanes made from
aluminium alloys
58 of 58

Other cards in this set

Card 2


what is bauxite and the formula


the main aluminium ore containing aluminium oxide Al2O3

Card 3


why does the economics of metals change


Preview of the front of card 3

Card 4


how are metals extracted from their ore


Preview of the front of card 4

Card 5


how does reduction with carbon work


Preview of the front of card 5
View more cards


No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all Metals, metal ores and alloys resources »