Get set... demonstrate: iodine clock


A video and teacher notes providing an introduction to reaction rates and kinetics, in which a colourless solution changes to dark blue.

Type of Activity




Age Group

14 to 18 years


A collaboration between the Gatsby Foundation and the British Science Association to support science demonstrations as part of National Science and Engineering week 2014
iodine-clock-demonstratio... RSC Recommended

This is an eye-catching colour change demonstration, in which a colourless solution suddenly changes to a dark-blue.


This video is part of the Get set…demonstrate demo day campaign. We want to generate a wave of inspiring science demonstrations in UK secondary schools on 20 March 2014 - the first national demo day!

Take part in an exciting nationwide event that will help you explore new concepts and provoke discussions with your students.