Produce harmless gas to inflate a rubber balloon

[ShashankRGoel]

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.
Thanks
Shashank

 

[russ_watters]

Baking soda + vinegar = carbon dioxide (among other things).

 

[lightarrow]

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...

 

[chemisttree]

The smaller the starting material and the greater the gas produced, the more dangerous the thing is.

 

[BlueEye]

What about the speed of reaction in vinegar + sodium carbonate ? How fast does it produce gas? Anyone ever tried?