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Levitating bubbles

  1. Oct 27, 2013 #1
    Hello.
    When I was on a scientific event, some students show a experiment with a bubbles.
    They poured into the bottle baking soda and vinegar. Then they blowing bubbles directly into the bottle, where the bubbles levitated. Why they levitated? Can you express a chemical equation?

    Thank you very much!
     
  2. jcsd
  3. Oct 27, 2013 #2

    Simon Bridge

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    Baking soda and vinegar would be very frothy... lots of bubbles already.
    How did the students blow bubbles into this mixture? You mean they blew soap bubbles in air and allowed them into the container, and the soap bubbles floated above the liquid?

    That's normal buoyancy - the acid+base reaction gives off carbon-dioxide which is denser than air. The soap bubbles, being mostly air, were less dense than the carbon-dioxide layer.

    http://www.hometrainingtools.com/bubbles-and-baking-soda/a/1512/

    http://chemistry.about.com/od/chemi...-Reaction-Between-Baking-Soda-And-Vinegar.htm
     
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