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The volcano experiment demonstrates the classical chemical reaction between an acid and a carbonate to simulate a volcanic eruption. By mixing vinegar with washing up liquid and pouring this into baking soda, a foam is produced that rapidly expands in volume. Food colouring can be added to make the show more visually appealing!

Suggested teaching points

  • States of matter
  • Acids and bases
  • Effervescence
  • Surface area

This file contains a set of detailed instructions, suggested questions, suggested improvements and disposal procedures for this experiment.

(PDF Document) Volcano experiment instructions

Before attempting this experiment, please ensure that you have read the safety section in the document above and performed a complete risk assessment. If you have any questions, comments or feedback, please use these forms.