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Example of an reaction

  1. Sep 25, 2004 #1
    Does anyone know an example of a reaction which produces gas?
  2. jcsd
  3. Sep 25, 2004 #2


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    Hello, all metals with oxidation potential higher than that of hydrogen produces gas when treated with an acid. For example, zinc is a good metal to produce hydrogen gas:

    [tex]Zn+H^{+}\rightarrow Zn^{2+}+H_2[/tex]

    If you need nitrogen gas, then try this:

    [tex](NH_4)_2Cr_2O_7 + heat\rightarrow N_2+Cr_2O_3+~H_2O[/tex]

    For oxygen, you'll use hydrogen peroxide with acids on metal ions or any reducible substance:

    [tex](NH_4)_2Cr_2O_7~+~H_2O_2~+~HCl \rightarrow CrCl_3~+~O_2~+~NH_4Cl~+~H_2O[/tex]

    Also, ammonium salts give ammonia with heating with an alkali:

    [tex]NH_4Cl~+~NaOH \rightarrow NH_3[/tex]

    As a last example, carbon dioxide can be produced from carbonates:

    [tex]Na_2CO_3~+~HCl \rightarrow CO_2[/tex]

    I hope these are helpful. There are plenty more examples, but these were what I remembered quickly and wrote. You'll have to balance (and write the other unimportant products) for some reactions.
    Last edited: Sep 25, 2004
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