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9 January, 16:00

Consider the following reaction

CO2 (g) + H2 (g) - COG) + H2011)

What is being oxidized?

carbon

carbon dioxide

oxygen

hydrogen

Dedio

+5
Answers (1)
  1. 9 January, 16:57
    0
    H2

    Explanation:

    CO2 + H2 → CO + H2O

    ↓ (-2). 0. (+2) (-2). (+1) (-2)

    ↓ ·2 (+2)

    +4 (-4)

    Write down the oxidation number under each element, each molecule should equal 0 unless there is a charge shown.

    Oxygen, always has an oxidation number of - 2 unless in a peroxide.

    Hydrogen, is - 1 with metals,+1 with non-metals. Hydrogen loves non-metals!

    H2 is zero because any standalone element has an oxidation number of zero

    What is being oxidized? Whatever is being oxidized, loses electrons and becomes more positive, it will be a whole molecule, not just an element. In this case, the H in H2 goes from 0 to (+1) so it is the oxidized molecule.
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