Creating an effervescent universal indicator ‘rainbow’

This quick practical uses existing chemicals in your learning space, for students to observe the effervescent reaction that causes universal indicator to create a ‘rainbow’ of colour. Kit list and safety instructions included.

In this experiment, students will add a sodium carbonate solution to a burette containing a little hydrochloric acid and universal Indicator. The two solutions react, with effervescence, and the liquid in the burette shows a ‘rainbow’ of all the colours of universal Indicator

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