Activity 2: Making a chemical fire extinguisher
This activity is carried out by the students under teacher supervision. There are two variations: in the simpler one (version 1), we produce carbon dioxide in a beaker and then find that it will extinguish a lighted match or candle placed in the beaker. In version 2, we tip the carbon dioxide over the flame – an action similar to that of using a fire extinguisher to put out a fire.