Halogen displacement reactions

• going down the group the halogens get less reactive
• going down the group the halogens get less reactive: because there are more shells of electrons
• going down the group the halogens get less reactive: there is a greater distance between positive nucleus and outer shell electrons
• going down the group the halogens get less reactive: because it is harder to attract another electron
• a displacement reaction is when a more reactive element displaces a less reactive element in a compound.
• potassium iodide + chlorine --> potassium chloride + iodine (chlorine will displace)
• aq (aqueous) = state symbol = dissolved in water
• in displacement reactions the solution changes colour according to the halogen that is displaced.
• in displacement reactions the solution changes colour according to the halogen that is displaced: if bromine is displaced the solution turns orange.
• in displacement reactions the solution changes colour according to the halogen that is displaced: if iodine is displaced - the solution turns brown