Formation of
aluminium iodide
Aluminium reacts with iodine according to the equation below.
2Al(s) +3 I2(s) => 2AlI3(s)
Use a mortar and pestle to grind the iodine into a fine powder
and mix it with aluminium powder. Mix equal amounts of each reactant.
Start with small quantities of about 1 gram for each reactant.
This should only be done by experienced professionals.
As the reaction proceeds a great deal of energy is evolved as shown in the video on the right.
The reaction gives off a great deal of heat. A molten product is visible, as shown on the right, after the reaction has ceased. As it cools the aluminium iodide becomes very brittle.
The melting temperature of aluminium iodide is 191 oC.
