C9 - Extraction Of Iron (and some quesitons about extraction of aluminium

Question 1

What is the ore from iron

Answer 1

Hematite

Question 2

What is the ore from aluminium

Answer 2

Bauxite

Question 3

How is aluminium extracted

Answer 3

Electrolysis

Question 4

What is electrolysis

Answer 4

Electrolysis is a process in which electrical energy is used to drive a non-spontaneous chemical reaction. It involves passing an electric current through a substance (usually in a liquid state or solution) to break it down into its components.

Question 5

First step of how iron is extracted from its ore

Answer 5

Burning of carbon (coke) to provide heat and form carbon dioxide
C (s) + O₂ (g) → CO₂( g)

Question 6

Step 2 of how iron is extracted from its ore

Answer 6

Reduction of carbon dioxide to carbon monoxide
CO₂ (g) + C (s) → 2CO (g)

Question 7

Step 3 of how iron is extracted from its ore

Answer 7

Reduction of iron oxide by carbon monoxide
3CO (g) + Fe₂O₃ (s) → 2Fe (l) + 3CO₂ (s)

Question 8

Step 4 of how iron is extracted from its ore

Answer 8

Thermal decomposition of calcium carbonate (limestone) to produce calcium oxide. This step is needed to remove impurities
CaCo₃ (s) → CaO(s) + CO₂ (g)

Question 9

Step 5 of how iron is extracted from its ore

Answer 9

Calcium oxide and silicon oxide form molten slag
CaO(s) + SiO₂ (s) → CaSiO₃ (l)

CaSiO₃ = molten slag