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.
2022-04-18T08:30:00Z
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2022-02-14T07:30:00Z
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