Chemistry

  • Created by: poo
  • Created on: 26-03-13 12:44
Most metals are found in...
Ores
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the More reactive a metal is the.....
Harder it is to extract
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Reduction is...
the loss of Electrons/loss of oxygen
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why can't all metals can be extracted by a reduction reaction with carbon?
some metals are less reactive than carbon
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How is a reduction reaction done?
Metals ores are heated with carbon monoxide
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give 3 metals then can be extracted using carbon...
zinc,iron and tin
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Do very reactive metal form stable or unstable ores?
stable
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How do we extract more reactive metals than carbon?
electrolysis
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electrolysis is using _________ to _________ the metal from other elements in the _________ .
Electricity, separate, compound
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How and why is Aluminium extracted?
by electrolysis because its more reactive than carbon
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Aluminium main ores is_______ and is pure aluminium _______, it is a very _________ metal.
Bauxite (Al 0) oxide, abundant
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what is Al melting point?
over 2000 degrees
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molten Cryolite is used to.....
lowers the temperature making it easier and cheaper
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the Electrodes are made of ..... and why
Graphite- a good conductor of electricity
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is the anode - and +
positive
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what is special about the cathode for extracting Al?
it lines the vessel
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why does the Al have to be molten?
to allow it to conduct electricity and become free ions
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positive Al ions are attracted to the _______ charged _______, where they pick up ______ and turn in Al ______.
negatively, cathode, electrons, atoms
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where do the Al go after it has been turned into atoms?
sink to the bottom
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what happens to the oxygen ions?
they are attracted to the anode (+) where they lose electrons to become atoms.
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what gas(es) are produced at the anode and why does it need to be replaced?
O and CO because the atoms reacts with the carbon in the anode which is constantly getting worn down so needs replacing.
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Overall it is a _______ reaction because both _______ and ________ take place.
Redox, reduction, oxidation
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what are the reactions at both electrodes ?
cathod:
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Other cards in this set

Card 2

Front

the More reactive a metal is the.....

Back

Harder it is to extract

Card 3

Front

Reduction is...

Back

Preview of the front of card 3

Card 4

Front

why can't all metals can be extracted by a reduction reaction with carbon?

Back

Preview of the front of card 4

Card 5

Front

How is a reduction reaction done?

Back

Preview of the front of card 5
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