and iodine are extracted form brine by displacing with chlorine. 2HBr + Cl2 -> 2HCl + Br2 ^ 2HI + Cl2 -> 2HCl + I2 ^ See also Double-displacement reaction Decomposition reaction Combination reaction Substitution reaction References External links Reactivity series by RSC Halogen displacement reaction by RSC Chlorine water reacting with Iodide and Bromide, YouTube Chemical reactions