Reactions of Iron

This video explores the reactions of iron with air, water, halogens, acids, and in displacement reactions. Iron reacts with air to form rust, a hydrated iron oxide, and with water if air is present. It forms iron halides with halogens, though iodine reacts less effectively. Iron reacts with acids to produce metal salts and hydrogen, with concentrated acids sometimes forming a protective oxide layer. In displacement reactions, iron can displace metals lower in the reactivity series. The video concludes with a summary of these reactions.

How does iron react with halogens, and what does it produce?

What is the process called when iron forms an oxide layer in concentrated acids?