NILERED / SCIENCE PHOTO LIBRARY NILERED / SCIENCE PHOTO LIBRARY
Reaction between bromine and aluminium. Bromine (Br2, orange liquid in test tube) is a halogen. Aluminium (Al, foil placed in test tube) is a metal. These two chemical elements produce a violent exothermic reaction when placed together, resulting in the formation of the solid aluminium bromide (AlBr3). Other chemicals produced by further reactions taking place here include the dimeric form of aluminium bromide (Al2Br6), which forms a white smoke. The aluminium bromide also reacts with any water vapour present to produce the gas hydrogen bromide (HBr).
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