Sodium carbonate solution is added 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 from red through orange, yellow, green and blue to purple.
This practical is part of our Chemistry for Non-Specialists collection.
2020-07-15T13:34:00Z
In this escape room article, students explore colour change reactions to reveal hidden codes
2020-07-01T08:36:00Z
Are chemistry learning applications really worthwhile?
2020-06-24T09:05:00Z
From zooming in on chemical phenomena to explaining marking schemes, try these teacher-tested approaches
2020-09-17T11:28:00Z
A lesson presentation with activities for your 11–14 students on polymers and their properties
Use your smartphone to measure changes in concentration across different juice drinks at home or in the classroom. Includes a video aimed at learners, kit list, instruction and explanation.
2020-09-14T10:48:00Z
Explore polymers and redox via food wrap innovations with this activity for 11–16 students
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