Chem - Reactivity Series And Extraction Of Metals

Question 1

What is the charge of ions formed by metals reacting with other substances

Answer 1

Positive

Question 2

List the full reactivity series

Answer 2

Potassium- please
Sodium- send
Calcium- Charlie’s 
Magnesium- monkeys 
Aluminium- and
Zinc- zebras 
Iron- in
Lead- lead
Copper- cages
Silver- securely 
Gold- guarded

Question 3

Which type of metals have the greatest tendency to form positive ions?

Answer 3

More reactive metals are more likely to lose electrons and therefore form positive ions

Question 4

How does displacement work?

Answer 4

A more reactive metal can displace a less reactive metal from a compound

Question 5

What two things must be present for iron to rust?

Answer 5

Air and water - salt will also increase rate of rusting but not necessary

Question 6

How can corrosion be prevented?

Answer 6

By applying a coating which acts as a barrier such as greasing, painting or galvanising

Question 7

What is sacrificial protection?

Answer 7

Where are more reactive metal is sacrificed to protect the less reactive metal on the inside, eg galvanising using zinc

Question 8

How are unreactive metals such as gold found?

Answer 8

As pure substances in the ground

Question 9

How are metals less reactive than carbon found?

Answer 9

In their oxide form, they must be extracted by reduction which removes the oxygen