Any old iron?
INVOLVES IRON WOOL - Can irritate skin!
You will need:
- gloves (marigolds?) to protect against iron wool and hot water!
- access to sink/bowl and (v)hot water-probably the kitchen sink is best
- bottle with tube ( as shown on the video)
- wire ( iron/steel) wool ~ 5cm x 5cm
- 3 jam jars with lids (important to have lids)
- 25g rice
- 25 ml vegetable oil
What we did..
We set up three jam jars to see if changing the conditions affects the way in which a piece of iron goes rusty.
The three jam jars contained:
1 : water, iron wool and air
2 : boiled water with a layer of oil on top, iron wool
3: air, iron wool and dry rice
What we found out..
The iron in jar 1 went rusty . The iron in tubes 2 and 3 did not rust
Enter your text here ...
The tekkie bit..
In jar 1 the iron was exposed to water and air. In jar 2 the iron was exposed only to water. The water had been boiled to remove the dissolved oxygen . A layer of oil was put on top of the water in order to exclude air. In jar 3 the iron was exposed to air only . The air was kept dry by putting some uncooked rice underneath it. This absorbed any moisture from the air trapped in the jar and kept the iron dry.
This experiment proves that iron rusts when exposed to air and water. Rust is a form of hydrated iron oxide.