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Praxis II General Science

Category - Chemistry

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For the following reaction, what is the oxidation half reaction?

O₃ + H₂O + SO₂ → SO₄^2- + O₂ + 2H⁺

O₃ + H₂O + SO₂ → 2e^-
H₂O + 2e^- → SO₂^2-
O₃ + SO₂ + 2e^- + O → SO₄^2- + O₂
H₂O → 2H⁺ + 2e^- + O
O₃ + H₂O + SO₂ → SO₄^2- + O₂ + 2H⁺

Explanation

Answer: D - The oxidation half reaction must result in the production of electrons in a balanced reaction. Answer C on the other hand, is the reduction half reaction, in which the addition of electrons results in a reduced sulfate product.

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