Reactivity series

Question 1

Reaction to deduce order of reactivity using water

Answer 1

React with water and very reactive metals will react vigorously
Less reactive metals will only react with steam
Copper will react will neither

Question 2

Reaction to deduce order of reactivity using dilute acids

Answer 2

The more reactive the metal the faster the reaction will go, the speed of the reaction is indicated by the rate at which the bubbles of hydrogen are given off

Question 3

Displacement reactions

Answer 3

a more reactive metal will displace a less reactive meal from its oxide because it will bond more strongly to the oxygen
If you put a reactive metal into a solution of a less reactive reactive metal salt the reactive metal will replace the less reactive metal in the salt

Question 4

oxidation

Answer 4

oxidation is the addition of oxygen to a substance in a reaction, or the reaction of a substance with oxygen

Question 5

reduction

Answer 5

reduction is the removal of oxygen from a substance in a reaction

Question 6

Conditions under which iron rusts

Answer 6

When iron is in contact with both water and oxygen

Question 7

How can the rusting of iron be prevented using barrier method

Answer 7

Coating with plastic- good for small structures

Oiling- used when moving parts are involved like bike chains

Question 8

How can the rusting of iron be prevented using sacrificial method

Answer 8

This involves placing a more reactive metal with iron
The water and oxygen will then react with this sacrificial metal instead
Zinc is often used, when sprayed on an object it is known as galvanising