3. Acids and bases – 3.1 Indicators to test acids and bases (alkalis) (teacher instructions) © Siemens Stiftung 2019 CC BY-SA 4.0 international

3. Acids and bases – 3.1 Indicators to test acids and bases (alkalis) (teacher instructions)

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Experimentation instructions:
Background information on the content and practical information on conducting the “Indicators to test acids and bases" experiment.

English
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2020-09-07
A good way to introduce the subject of acids and bases to students is in relation to our body: the tongue as a taste sensor, the acid mantle of the skin, soap in the eyes, acid burps, etc.
We can refer to natural and artificial dyes as “sensors” for acids and bases.
By the way, base is the general term whereas alkalis (they contain alkali metals) are a subset of basic substances.

One item deals with „Technical application and vocational orientation“.
Experiment
Biology; Chemistry
Grade 7 to 9; Grade 10 to 13
Middle/high school; Vocational training
Acids; Base (chemistry); Medicine (medical science)
Siemens Stiftung Media Portal
Dieter Arnold
© Siemens Stiftung 2019
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