Reactivity series

Question 1

List the reactivity series from most to least reactive

Answer 1

Please send lions, cats, monkeys and cute zebras into hot countries signed Gordon

Question 2

What are the conditions required for rusting?

Answer 2

Oxygen and water must be present for rusting to happen

Question 3

What is the equation for rusting?

Answer 3

iron + water + oxygen -> hydrated iron (3) oxide

Question 4

Describe an investigation for rusting:

Answer 4

1: Put an iron nail into a test tube that is filled half with water
2: Put an iron nail into boiling water with some oil on top
3:Put another iron nail into a test tube with just calcium chloride

Question 5

What is the outcome of the rusting investigation:

Answer 5

The nail with the test tube with water and oxygen rusts
The nail in the middle does not rust as there is no oxygen due to the oil and boiling
The nail on the right does not rust because there is no water
The results show that both oxygen and water MUST be present for rusting to occur

Question 6

What are the most common barrier methods?

Answer 6

Paint, oil, grease and electropainting

Question 7

What is meant by the term sacrificial protection?

Answer 7

A more reactive metal being attached to a less reactive metal which can prevent rusting

Question 8

What is an example of sacrificial protection?

Answer 8

Zinc blocks being put onto a ships hull

Question 9

What is meant by the term galvinisation?

Answer 9

It is the process where a layer of zinc covers the iron that is to be protected, this can be done by electroplating or dipping into molten zinc

Question 10

What is oxidation?

Answer 10

Any reaction in where an substance gains oxygen

Question 11

What is reduction?

Answer 11

Any reaction in which a substance loses oxygen

Question 12

What is an oxidation agent?

Answer 12

A metal oxide that supplies the oxygen (E.g CuO)

Question 13

What is a reducing agent?

Answer 13

A metal oxide that removes the oxygen (e.g Zn)