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6 August, 06:22

Write a balanced chemical equation for the standard formation reaction of gaseous formaldehyde CH2O

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  1. 6 August, 06:43
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    From the combustion of octane, the formaldehyde will be formed as this equation:

    C8H18 + O2 → CH2O + H2O this is the original equation but it is not a balanced equation, so let's start to balance it:

    the equation to be balanced so the number of atoms on the right side of the equation sholud be equal with the number of atoms on the lef side.

    -we have 8 C atoms on left side and 1 atom on the right side so we will try putting 8 CH2O on the right side instead of CH2O

    C8H18 + O2 → 8 CH2O + H2O

    we have 2 O atoms on the left side and 9 atoms on the right side so we will try first to put 9 O2 instead of O2 on the left side and put 2H2O on the right side and put 16 CH2O instead of 8 CH2O to make the atoms of O are equal on both sides = 18 atoms

    C8H18 + 9 O2 → 16 CH2O + 2H2O

    put now we have 8 atom C on the left side and 16 atom on the right side so, we will put 2 C8H18 instead of C8H18 now we get this equation:

    2C8H18 + 9O2 →16 CH2O + 2H2O

    -now we have 36 of H atoms on both sides.

    - and 16 of C atoms on both sides.

    - and 18 of O atoms on both sides.

    now all the number of atoms of O & C & H are equal on both sides

    ∴ 2C8H18 + 9O2 → 16 CH2O + 2 H2O

    is the final balanced equation for the formation of formaldehayde
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