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3 February, 00:07

Sulfur dioxide gets reacts with water vapor to produce aqueous hydrogen sulfite.

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  1. 3 February, 00:30
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    SO₂ + H₂O → HSO₃⁻ + H⁺

    Explanation:

    Assuming, you want to know the final balanced equation of this reaction, which is in words.

    Sulfur dioxide reacts with water vapor to produce aqueous hydrogen sulfite and H⁺ ions (acidic).

    Sulfur dioxide: SO₂ (g)

    Water vapor: H₂O (g)

    Hydrogen sulfite: HSO₃⁻ (aq)

    Before putting them in the equation, check for each element's oxidation state to identify the nature of the reaction.

    OS of S in SO₂ is + 4, and in HSO₃⁻ is also + 4.

    OS of H and O remain + 1 and - 2, respectively.

    SO₂ + H₂O → HSO₃⁻ + H⁺

    This further reacts to form sulfur trioxide (SO₃) gas, which is main cause for acid rain, as this reacts with water vapor in atmosphere to form sulfuric acid.
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