DISPLACEMENT

• HOW DO HALOGENS HAVE DISPLACEMENT REACTIONS?

  halogens react with metal halides in solution, and the halide will be displaced by a more reactive halogen
• WHAT HAPPENS TO REACTIVITY DOWN THE GROUP?

  decreases
• ORDERS OF DISPLACEMENT?

  chlorine will displace bromine and iodide, while bromine will displace iodide ions
• COLOUR OF SOLUTIONS SHOWING FREE HALOGEN IN SOLUTION?

  Cl2: very pale green solution (often colourless)

  Br2: yellow solution

  I2: brown solution
• WHAT COLOUR ARE ALL HALIDE SALT SOLUTIONS?

  colourless
• OBSERVATIONS OF SOLUTION COLOURS DURING DISPLACEMENT IF AN ORGANIC SOLVENT IS ADDED THAT DEMONSTRATE FREE HALOGEN?

  Cl2: colourless

  Br2: yellow solution

  I2: purple solution