2 d) Reactivity Series

Question 1

Barrier method

Answer 1

Method of rust prevention by coating iron with paint, oil, grease or plastic, so that oxygen/water cannot reach the iron/steel.

Question 2

Galvanisation

Answer 2

Method of rust prevention by coating iron with a layer of zinc.

Question 3

Oxidation

Answer 3

Gain of oxygen or loss of electrons.

Question 4

Oxidising agent

Answer 4

Something that oxidises something else. An oxidising agent is reduced in the reaction.

Question 5

Reducing agent

Answer 5

Something that reduces something else. A reducing agent is oxidised in the reaction.

Question 6

Reduction

Answer 6

Loss of oxygen or gain of electrons.

Question 7

Rust

Answer 7

Corrosion of iron in the presence of water and oxygen, called hydrated iron(III) oxide.

Question 8

Sacrificial protection

Answer 8

Method of rust prevention by attaching a block of more reactive metal to the iron where the more reactive metal undergoes oxidation in preference to the iron.

Question 9

Reactivity series

Answer 9

A list of elements (mainly metals) in order of decreasing reactivity.

Question 10

Redox

Answer 10

Reaction which involves both reduction and oxidation occurring together.