Sunday, July 12, 2009

Science Experiments: Magic soap bubbles

Baking soda and vinegar are very useful in science experiments, here we have another example in which this materials are used to amaze the people!
Put some vinegar in a aquarium, latter put some baking soda. The result of reaction is sodium acetate and carbon dioxide.
The CO2 is more dense than the air, so a soap bubble will float on it as a boat float on water. The buoyancy force is equal the weight of the bubble, thus we have the equilibrium and the bubble remains on interface CO2 / Air
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