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Reaction between aluminium and iodine

Description

The reaction between aluminium and iodine is catalysed by water. This is a spectacular demonstration as clouds of purple iodine vapour are produced.

Credits

:
This is an experiment from the Practical Chemistry project, developed by the Nuffield Foundation and the Royal Society of Chemistry.
reaction-between-aluminiu...



Apparatus Chemicals

Eye protection

Access to a fume cupboard (Note 1)

Each demonstration requires:

Mortar and pestle

Tin lid (or other metal container)
(Note 2)

Heat resistant mat

Teat pipette

Aluminium powder (fine) (HIGHLY FLAMMABLE), about 0.1 g

Iodine (HARMFUL, DANGEROUS FOR THE ENVIRONMENT), about 0.4 g

Warm water

Refer to Health & Safety and Technical notes section below for additional information.

 

 


Read our standard health & safety guidance

Sometimes the mixture fails to react and must be disposed of safely. It has been reported that in some cases the reaction can occur with a delay of several hours which can be hazardous. If you are disposing of a mixture which has not yet reacted pour this into an excess of 1M sodium hydroxide in a fume cupboard and leave until it all dissolves before resuming normal disposal.






The reaction between aluminium and iodine is catalysed by water. This is a spectacular demonstration as clouds of purple iodine vapour are produced.

ADDITIONAL INFORMATION

This is a resource from the Practical Chemistry project, developed by the Nuffield Foundation and the Royal Society of Chemistry. This collection of over 200 practical activities demonstrates a wide range of chemical concepts and processes. Each activity contains comprehensive information for teachers and technicians, including full technical notes and step-by-step procedures. Practical Chemistry activities accompany Practical Physics and Practical Biology .

The experiment is also part of the Royal Society of Chemistry's Continuing Professional Development course: Chemistry for non-specialists