Slowly... Iron turns to Rust
Iron and oxygen react very slowly, especially when it is damp. Over days and weeks the grey iron turns into orange-brown rust.
The result
- What it makes
- Iron(III) oxide (rust)
- Equation
- 4Fe + 3O₂ → 2Fe₂O₃
- When it happens
- Slowly, when iron is damp
Fun fact from Fizzy: Mars looks red because its dusty surface is full of rust!