3. Acids and bases – 3.5 What effect does acid have on teeth? (teacher instructions)
Background information on the content and practical information on conducting the “What effect does acid have on teeth?" experiment.
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“.