Iron

Question 1

What is the chemical name for iron?

Answer 1

Hydrated iron (III) oxide

Question 2

What is the chemical formula for iron?

Answer 2

Fe2O3

Question 3

What is an ore?

Answer 3

A substance found in an impure state that contains metal compounds (found in nature).

Question 4

What process can you use to obtain a pure metal if it’s…
a) more reactive than carbon?
b) less reactive than carbon?

Answer 4

a) electrolysis
b) use carbon to displace the less reactive element

Question 5

What are the required conditions for iron to rust?

Answer 5

Water and oxygen

Question 6

What does iron look like?

Answer 6

Red-brown solid

Question 7

What is a barrier method? Give some examples.

Answer 7

A physical layer that prevents oxygen and water from reacting with iron. Examples: paint, oil, plastic coating

Question 8

What is sacrificial protection? Give some examples.

Answer 8

A way that iron is protected by putting more reactive metals on it, which oxygen will more preferably react with. Examples: blocks of magnesium/zinc or scraps of magnesium

Question 9

What is galvanising? Give some examples.

Answer 9

A form of protection involving sacrificial protection and a physical barrier. For example, fully coating an iron boat in zinc.

Question 10

What is corrosion?

Answer 10

The wearing down of metals overtime.