1. Rusting

2. What you need to know about rusting
Rusting is the corrosion of iron (& steel). Other metals can CORRODE but not rust
It is an oxidation process (addition of oxygen)
Rust is hydrated iron oxide
Both water and oxygen (from the air) are required for rusting
Salt and other electrolytes (e.g. acid) can act as catylysts and speed up rusting

3. Group practical:
Design an experiment to prove that oxygen and water are needed for rusting to occur and that salt increases the rate of rusting
Work in groups of 2-4
In your notebooks:
Identify the
Independent Variable
Dependent Variable
Control Variables (minimum of 5)

4. Results from last lesson: What is needed for rusting and does salt increase the rate of rusting.
Fill in your table of results