C5 - Reduction with Carbon

Question 1

What are minerals?

Answer 1

These contain elements and compounds.

Question 2

What are ores?

Answer 2

These contain varying amounts of minerals. Ores are rocks from which metals can be extracted.

Question 3

Name two ores.

Answer 3

Haematite - Iron (III) oxide - Fe2O3

Chalcopyrite - Copper iron sulfide - CuFeS2

Question 4

Why are some metals found in the Earth as they are? Why is it harder to discover others?

Answer 4

Reactivity.
Gold is unreactive so exists as it is in the Earth.
Other elements such as sodium are more reactive so harder to discover!

Question 5

When is reduction used? When is electrolysis used?

Answer 5

Reduction is used when the metal is less reactive than carbon so the metal ore can be reduced by the carbon, which is oxidised.
Electrolysis is used for more reactive metals.

Question 6

What metals are reduction reactions used for ?

Answer 6

Zinc, iron, and copper!