Reactivity series

Question 1

How can metals be arranged into a reactivity series based on reactions with water and dilute acids

Answer 1

More Violent = more reactive

Question 2

How to tell reactivity from displacement reactions

Answer 2

A metal will displace another metal from its oxide or salt

Question 3

What is the reactivity series (in order)

Answer 3

Potassium
Sodium
Lithium
Calcium
Magnesium
Aluminium
Zinc
Iron
Copper
Silver
Gold

Question 4

What are the conditions for iron to rust

Answer 4

Oxygen and Water

Question 5

How can rusting be prevented

Answer 5

Barrier Methods: stops water and oxygen getting to iron
Grease, oil, paint, plastic

Galvanising: coating in zinc
even if barrier is broken, the zinc reacts before the iron

Sacrificial Protection: More reactive metal will react before the iron

Question 6

Explain Redox ect in terms of electrons and oxygen

Answer 6

Oxidation = loss of electrons = gain of oxygen
Reduction = gain of electrons = loss of oxygen
Redox = involves both O and R
Oxidising agent = gives oxygen (it itself is reduced)
Reducing agent = takes oxygen (it itself is oxidised)

Question 7

How does redox relate to metal displacement

Answer 7

Replaced in oxide