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.
Link the science you teach in your classroom to poverty and inequality targeted by the UN’s SDGs
Use these tips to link UN sustainable development goal 14 to your lessons on dissolved ions, acids and the pH scale
Worksheet to develop understanding of the pH scale and apply it in the context of ocean acidification. Extension questions provide more challenge on carbonic acid and acid base equilibrium, leading to a research task on the consequences for marine organisms
Show your learners the difference that science can make and provide them with role models who are leading chemists in their fields.
Critical thinking and research task, reflecting on the science and societal views surrounding drugs and their development
In this activity students are required to apply their understanding of redox to identify which metal is oxidised and which is reduced in a series of displacement reactions
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