S4bfGracieChil S4bfGracieChil

10-11-2016
Chemistry

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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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scme1702 scme1702

15-11-2016

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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