Displacement Reactions

How can the halogens relative oxidising strengths be seen?

In their displacement reactions with halide ions

What will more reactive halogens do?

Oxidise and displace the halide ions of less reactive halogens

What happens to reactivity?

Reactivity decreases down the group

How will a halogen displace a halide from solution?

If the halide is below the halogen in the periodic table

What will chlorine displace?

Bromine and iodine

What will bromine displace?

Iodine

What will iodine displace?

None

What colour is bromine water?

Orange

What colour is iodine water?

Brown

Since brown and orange look similar, how can you make the changes easier to see?

By shaking the reaction matters with an organic solvent, hexane

What will happen when you shake the reaction mixture with hexane?

The halogen that's present will dissolve readily in the hexane, which settles out as a distinct layer, the solvent layer, above the aqueous solution.