Particles in motion? | Classic chemistry experiments | 11–14 years

Source: Royal Society of Chemistry

Explore the movement of gas particles by reacting calcium carbonate with hydrochloric acid and testing with limewater

Particles in motion is an abstract idea. Demonstrate to learners the movement of gas particles with this practical. Learners generate (and collect) carbon dioxide by mixing calcium carbonate and hydrochloric acid. They then allow the carbon dioxide to diffuse into an empty test tube. Next, learners carry out a chemical test to confirm that carbon dioxide particles have moved into the empty test tube. Resources include student worksheets, classroom slides and teacher notes with answers and technical information.

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