Halogens With Iron Wool

• Halogens react with iron to form salt:

  • Fluorine - reacts with almost anything instantly. Very few scientists handle this as it’s so dangerous.
  • Chlorine - reacts with heated iron will very quickly (brown fume).
  • Bromine - must be warmed and the iron wool heated . The reaction is faster (brown fumes).
  • Iodine - must be heated strongly and so does iron wool. The reaction is slow (purple fumes).
• Chlorine

  • Chlorine + iron -> Iron (III) chloride
  • 3Cl2 + 2Fe -> 2FeCl3