3. Acids and bases – 3.5 What effect does acid have on teeth? (teacher instructions) © Siemens Stiftung 2019 CC BY-SA 4.0 international

3. Acids and bases – 3.5 What effect does acid have on teeth? (teacher instructions)

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Experimentation instructions:
Background information on the content and practical information on conducting the “What effect does acid have on teeth?" experiment.

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PDF (185.9 kByte) DOC (348.5 kByte)
2020-09-07
Tooth enamel is the hardest material in our body, but very sensitive to acids. Acids are ingested with sour drinks or food or formed from sugar by bacteria in our mouth. Eggshells are made of a similar material as the teeth. In a model experiment with eggshells we are able to demonstrate how acid acts on teeth.
Eggshell consists of calcium carbonate which reacts with acids to form mostly carbon dioxide (forms bubbles) and soluble calcium acetate. After a few hours the shell has “disappeared”.

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; Agriculture; Base (chemistry); Medicine (medical science)
Siemens Stiftung Media Portal
Dieter Arnold
© Siemens Stiftung 2019
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