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28.7 x 43.7 cm ⏐ 11.3 x 17.2 in (300dpi)
TURTLE ROCK SCIENTIFIC / SCIENCE SOURCE / SCIENCE PHOTO LIBRARY TURTLE ROCK SCIENTIFIC / SCIENCE SOURCE / SCIENCE PHOTO LIBRARY
Aluminium reacts with iodine, 1 of 5. Powdered aluminium metal (Al) and iodine (I2) are mixed together and placed in a watch glass. A drop of water is used to initiate the synthesis reaction: Al + I2 -> Al2I6. It is an exothermic redox reaction that produces a lot of heat so that iodine sublimates and forms a violet vapour.
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