chemistry 1.3.1

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  • Created by: ambh0yle
  • Created on: 19-02-14 12:47
where are ores mined from?
the ground
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what do ores have to be before the metal is extracted and purified?
it needs to be concentrated
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what type of metals can we find in their native state?
gold and other unreactive metals.
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what changes whether a metal is worth extracting or not?
how easy it is to extract it from its ore, how much metal the ore contains.
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what does the reactivity series help us to decide?
the best way to extract a metal from its ore.
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metals that are less reactive than carbon are extracted how?
from their oxides by reduction with carbon
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how can metals be extracted?
from compounds by displacement using a more reactive element.
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what type of metals are extracted by electrolysis of molten compounds?
Metals that are more reactive than carbon, such as aluminium.
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how can copper be extracted from copper-rich ores?
by heating the ores in a furnace (smelting)
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what is phytomining?
it uses plants to absorb metal compounds + the plants are burned to produce ash that contains the metal compounds.
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what is bioleaching?
it uses bacteria to produce leachate solutions that contain metal compounds.
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How can copper be obtained from solutions of copper salts?
by electrolysis or by displacement using scrap iron.
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what metals cannot be extracted from their oxides by reduction with carbon?
aluminium and titanium
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why are current methods of extraction expensive?
there are many stages in the processes, large amounts of energy are needed.
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why should we recycle metals?
because extracting them uses limited resources and is expensive in terms of energy and effects on the environment.
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Card 2

Front

what do ores have to be before the metal is extracted and purified?

Back

it needs to be concentrated

Card 3

Front

what type of metals can we find in their native state?

Back

Preview of the front of card 3

Card 4

Front

what changes whether a metal is worth extracting or not?

Back

Preview of the front of card 4

Card 5

Front

what does the reactivity series help us to decide?

Back

Preview of the front of card 5
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