4- Metals and Oxygen Flashcards
1
Q
why is the reaction between metals and oxygen so important?
A
it is important because all metals we use every day are exposed to aur
2
Q
what are bridges made up of?
A
steel, an alloy made up of iron and carbon.
3
Q
what two things does iron form in reaction with oxygen and oxygen in the presence of water?
A
iron oxide and hydrated iron oxide (rust)
4
Q
why are rust and iron oxide dangerous for bridges?
A
they are brittle and can cause the bridge to collapse
5
Q
how can rusting on a bridge be prevented?
A
it can be prevented by painting over it or using oil. it prevents oxygen and water from reacting with the iron.
