Iodine Clock

Synopsis: This video shows an eye-catching colour change demonstration in which a colourless solution suddenly changes to a dark-blue after an amount of time. It is known as the ‘iodine clock’ as there is a delay before the colour change. The demonstration is particularly well-suited as an introduction to reaction rates and kinetics.
This resource, funded by the Gatsby Charitable Foundation and the Royal Society of Chemistry, was produced following National Science & Engineering Week 2013, during which teachers and technicians nominated their favourite demonstrations to be turned into video resources with accompanying written guides. [6 minutes]
Series: Get Set Demonstrate
Language: English
Country: Great Britain
Subjects: Chemistry; Education
Keywords: reaction kinetics; teaching materials

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British Universities Film & Video Council