Metals and reactivity Flashcards
0
Q
What are the 3 conditions needed for rusting?
A
Oxygen, water and iron
1
Q
What happens when a metal reacts with oxygen?
A
An oxide is produced.
2
Q
What conditions help speed up rusting?
A
acid and salt
3
Q
List 3 methods of preventing rusting.
A
Coating of oil - makes sure that oxygen and water doesn’t reach the metal
Galvanising - applying a coating of zinc to the metal, it is hard for water to get through zinc
Stainless steel coating - prevents water from reaching the metal
Coating of plastic - prevents water from reaching the metal
Coating in another metal - using another metal to prevent water and oxygen from reaching the metal
Coating of paint - stops water from reaching the metal
4
Q
List the reactivity series in order.
A
Sodium Calcium Magnesium Aluminium Zinc Iron Copper Silver Gold
