Iron

Question 1

How does iron rust

Answer 1

1) Water and oxygen must be present
2) Iron gains oxygen to become iron (III) oxide
3) Water then becomes loosely bonded to the iron (III) oxide and the result is hydrated iron (III) oxide
4) This is commonly known as rust

Question 2

Rusting equation

Answer 2

Iron + oxygen + water –> hydrated iron (III) oxide

Question 3

Two ways to prevent rusting

Answer 3

1) Barrier methods such as paint, coating with plastic, oiling, and greasing
2) The sacrificial method such as galvanizing (coating with zinc)