Rusting Of Iron

Question 1

Chemical name for rusting

Answer 1

Hydrated iron (iii) oxide

Question 2

Chemical formula for rusting

Answer 2

Fe2O3.2H2O

Question 3

Word equation for rusting

Answer 3

Salty water + Oxygen -> hydrated iron (iii) oxide

Question 4

Chemical equation for rusting

Answer 4

4Fe + 4H2O + 3O2 -> 2Fe2O3.2H2O

Question 5

Painting examples

Answer 5

Railings

Bicycle frames

Question 6

Oiling/greasing examples

Answer 6

Bicycle chains

Hinges

Question 7

Sacrifical protection example

Answer 7

Shipping

Question 8

Galvanising example

Answer 8

Mop buckets

Question 9

Stainless steel examples

Answer 9

Cutlery

Question 10

Only water

Boiled water & oil layer conditions

Answer 10

When water is boiled oxygen is removed and oil prevents oxygen entering.

Question 11

Salt water conditions

Answer 11

Salty water

Oxygen & water both present and salt speeds up the process of rusting

Question 12

Air conditions

Answer 12

Moist oxygen

Air contains water particles providing moisture

Question 13

Air + Calcium Chloride

Answer 13

Dry oxygen

Calcium chloride removes moisture

Question 14

Water + oxygen condition

Answer 14

Water + oxygen

Question 15

Is rusting present in boiled water + oil layer

Answer 15

No

Question 16

Is rusting present on salt water

Answer 16

Lots

Question 17

Is rusting present on air

Answer 17

A little

Question 18

Is rusting present on air + calcium chloride

Answer 18

No

Question 19

Is rusting present on water + oxygen

Answer 19

Yes