C1 Extracting metals and Alloys Flashcards
What is an ore?
A rock from which it is economical viable to extract the metal
Give 1 reason why the economics of extracting from ores can change?
If the price of the metal changes then its extraction can become more or less cost effective
Give 5 ways mining ores has an impact.
Dust
Noise
Increased traffic
Eyesore
Increase in jobs
Why is Gold found in the ground as an element?
Low reactivity
How is iron extracted from its ore?
Using carbon in the blast furnace
What type of reaction is used to extracted iron from its ore?
Reduction
Give a word equation for this reaction.
Iron oxide + Carbon → Iron + carbon dioxide
Give a symbol equation for this reaction.
2Fe2O3 + 3C → 4Fe + 3CO2
Why is the extraction of iron possible?
Carbon is more reactive than iron
How is aluminium extracted from its ore?
electrolysis
Why is the extraction of aluminium not the same as iron?
Aluminium is more reactive than carbon
Give 2 reasons why the extraction of aluminium is expensive.
Energy needed to melt the aluminium oxide, electricity needed for the electrolysis
How is copper extracted from copper-rich ores?
Smelting
How is copper purified?
Electrolysis
What other method can be used to extract copper from solutions of copper salts?
Displacement