Presentation on theme: "Displacement of halogens If a halogen is added to a solution of a compound containing a less reactive halogen, it will react with the compound and form."— Presentation transcript:
Displacement of halogens If a halogen is added to a solution of a compound containing a less reactive halogen, it will react with the compound and form a new one. sodium chloride sodium fluoride chlorinefluorine ++ F 2 (aq)2NaCl (aq)2NaF (aq)Cl 2 (aq) ++ A more reactive halogen will always displace a less reactive halide from its compounds in solution. This is called displacement.
Chlorine water Bromine water Iodine water KBr added KI added KCl added KI added KCl added KBr added Colour change Yes Yes No Yes No No Q) Write an equation to show the reactions which are taking place in tubes 1,2 and 4
Displacement Equations Potassium Bromide and Chlorine: 2KBr + Cl 2 2KCl + Br 2 Potassium Iodide and Chlorine: 2KI + Cl 2 2KCl + I 2 Potassium Iodide and Bromine: 2KI + Br 2 2KBr + I 2
Displacement reactions: summary The reactions between solutions of halogens and metal halides (salts) can be summarised in a table: 2KCl + I 2 2KBr + I 2 halogen chlorine bromine iodine salt (aq) potassium chloride potassium iodide potassium bromide 2KCl + Br 2 no reaction