Extracting Iron Flashcards
1
Q
Temperature
A
1500
2
Q
How do you form the Iron
A
carbon monoxide + iron(III) oxide
3CO + Fe2O3 = 3CO2 + 2Fe
3
Q
Iron ore
A
contains the iron
4
Q
limestone
A
takes away impurities
5
Q
Iron extracted from…
A
haematite (Fe2O3)
6
Q
what is the impurity?
A
sand (silicon dioxide)
7
Q
coke
A
pure carbon reducing iron oxide to iron metal
8
Q
How do you remove silicon dioxide
A
- limestone decomposed by heat into calcium oxide
CaCO3 = CaO + CO2
- calcium oxide reacts with the sand to form silicon dioxide (slag)
CaO + SiO2 = CaSiO3
9
Q
what is slag used for
A
- Road Building
- fertiliser
10
Q
How do you form carbon dioxide
A
coke + oxygen
C + O2 = CO2
11
Q
How do you form Carbon monoxide
A
carbon dioxide + unreacted coke
CO2 + C = 2CO
