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« Video Demo: 7 Inertia Demos | Main | Starting Over »
Sunday
Jun072009

Video Demo: Cola Volcano

Signs of a chemical reaction include color change, gas production, temperature change, precipitation, and other changes in properties …including density, taste, texture, smell, melting point, boiling point, etc. This demonstration will really make them think about it. Place a large plastic container on the counter. Invert a large jar or beaker into the container. Set a 3/4 full liter of fresh cola on top. Carefully but quickly pour a cupful of sugar into the soda and stand back. The cola will burst out of the bottle. Most students will assume it is a gas production sense they can see all of the foam. Have the students taste the left over soda. It is very sweet and very flat, indicating the soda is still there and the carbon dioxide left. It is a physical change and not a chemical change. The sugar pushes out all of the carbon dioxide gas.

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  • Response
    Response: www.aquadiva.ca
    Interesting post reminds me of another gem. - If you pick up a starving dog and make him prosperous, he will not bite you. This is the principal difference between a man and a dog. - Mark Twain 1835 - 1910
  • Response
    Response: vimamarmi.it
    Twitter had a tweet on Neiko Tools Abrasives Blades that lead me hear for some reason. Not sure what this has to do with what I was searching for.

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