Problem. A few drops of aqueous bromine were added to a solution of iron (II) sulphate. The reddish-brown bromine was decolourised. The iron (II) sulphate turned from pale green to brown. Why is the reddish-brown bromine decolorized, and what causes the green iron (II) sulphate solution to turn brown?
Attempt. This is in my assignment on redox. I know that the reaction is not halogen displacement (besides, bromine would be a weak oxidizing agent in a halogen displacement reaction), metal displacement (bromine is not a metal), or hydrogen displacement (no hydrogen). I want to get an equation for the reaction. I know that after the reaction with bromine, there are Fe^(2+), SO_4^{2-} and Br^- ions.
Please help.