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Produce harmless gas to inflate a rubber balloon

  1. Aug 1, 2010 #1
    Hi to all
    I am new to this forum. I need some help.
    I want a chemical reaction which produces a harmless gas with the use of small amount of reactants.
  2. jcsd
  3. Aug 1, 2010 #2


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    Staff: Mentor

    Baking soda + vinegar = carbon dioxide (among other things).
  4. Aug 1, 2010 #3
    Don't know what you mean with "small amount". However you can begin with a classic: vinegar + sodium carbonate:

    2CH3COOH + Na2CO3 --> CH3COONa + H2O + CO2

    Instead of acetic acid of vinegar you can use hydrochloric or sulphuric or phosphoric acid:

    2HCl + Na2CO3 --> 2NaCl + H2O + CO2

    H2SO4 + Na2CO3 --> Na2SO4 + H2O + CO2

    2H3PO4 + 3Na2CO3 --> 2Na3PO4 + 3H2O + 3CO2

    Edit: beaten on the time about the first...
  5. Aug 2, 2010 #4


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    The smaller the starting material and the greater the gas produced, the more dangerous the thing is.
  6. Aug 6, 2010 #5
    What about the speed of reaction in vinegar + sodium carbonate ? How fast does it produce gas? Anyone ever tried?
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