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24 June, 16:40

Write a molecular equation for the gas-evolution reaction that occurs when you mix aqueous hydroiodic acid and aqueous sodium sulfite.

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  1. 24 June, 17:35
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    First, we construct the reaction equation:

    Na₂SO₃ + 2HCl → 2NaCl + SO₂ + H₂O

    H₂SO₃ is formed as an intermediate but decomposes to water and SO₂ gas.
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