Chem2 - Extraction of Metals

Question 0

Haematite being reduced by a gas

Answer 0

Fe2.O3 + 3CO —> 2Fe + 3CO2

Question 1

Haematite being reduced by a solid

Answer 1

2Fe2.O3 + 3C —> 4Fe + 3CO2

Question 2

Reaction which produces heat in a blast furnace

Answer 2

C + O2 —> CO2

Question 3

Reaction which produces reducing agent in a blast furnace

Answer 3

C + CO2 —> 2CO

Question 4

Reduction of Manganese (IV) oxide with a solid

Answer 4

MnO2 + C —> Mn + CO2

Question 5

Reduction of Manganese (IV) oxide with a gas

Answer 5

MnO2 + 2CO —> Mn + 2CO2

Carbon compounds like 2 when Manganese (IV) oxide is reduced by a gas :)

Question 6

Reduction of Copper carbonate with coke

Answer 6

2CuCO3 + C —> 2Cu + 3CO2

Copper likes 2s in this reaction :)

Question 7

Reduction of copper carbonate in 2 stage process

Answer 7

1) decomposition
CuCO3 —> CuO + CO2

2) reduction by C, copper only by C really…
2CuO + C —> 2Cu + CO2

Once again copper likes 2s :)

Question 8

Reaction for extraction of Tungsten

Answer 8

WO3 + 3H2 —> W + 3H2.O

Question 9

Electrolysis of Al half equations and where

Answer 9

Al^3+ + 3e- —> Al at cathode

2O^2- —> O2 + 4e- at anode

Question 10

The first stage in the extraction of Titanium

Answer 10

TiO2 + 2Cl2 + 2C —> TiCl4 + 2CO

Question 11

The second stage in the extractionof Titanium

Answer 11

TiCl4 + 2Mg —> Ti + 2MgCl2

Or

TiCl4 + 4Na —> Ti + 4NaCl

Question 12

Use of scrap Iron

equation

Answer 12

Extract copper from low grade ores

Cu^2+(aq) + Fe(s) —> Cu(s) + Fe^2+(aq)