A simple activity designed to illustrate conservation of mass is reported. The activity uses a two-liter soda bottle to contain the products of a gas-evolving reaction. While any number of gas-evolving reactions could be used in this activity, a specific procedure for vinegar and baking soda is given since these materials present nominal hazards and are readily available to K-12 teachers.
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Citation
Duffy, Daniel Q.; Shaw, Stephanie A.; Bare, William D.; Goldsby, Kenneth A. J. Chem. Educ.1995 72 734.
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