Oxidation, reduction and the extraction of metals (AQA GCSE Chemistry Combined Science): Flashcards
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12 cards from this deck
Definition of oxidation
Definition of oxidation
Gaining oxygen atoms
Definition of reduction
Definition of reduction
Losing oxygen atoms
What forms when metal reacts with oxygen?
What forms when metal reacts with oxygen?
Metal oxide
What process converts metal oxide to metal?
What process converts metal oxide to metal?
Reduction
How are most metals found in nature?
How are most metals found in nature?
As metal oxides or other compounds
Extraction method: K, Na, Li, Ca, Mg, Al
Extraction method: K, Na, Li, Ca, Mg, Al
Electrolysis
What electrolysis uses
What electrolysis uses
Electricity
Extraction method: Zn, Fe
Extraction method: Zn, Fe
Heating with carbon
Cost: electrolysis vs carbon heating
Cost: electrolysis vs carbon heating
Electrolysis more expensive
How Cu, Ag, Au sometimes found
How Cu, Ag, Au sometimes found
Naturally as pure elements
Why reactive metals need electrolysis
Why reactive metals need electrolysis
They hold oxygen more strongly
Process all metal extraction involves
Process all metal extraction involves
Reduction