Redox reaction????????????????

SO2 and FeSO4. Athough SO2 can act as both an reducing agent and an oxidizing agent, its oxidizing power is low. Since SO2 is a too weak oxidizing agent, it cannot oxidize Fe2 (aq) ions.

SO2 can act as both a reducing agent and an oxidizing agent.
However, SO2 usually acts as a reducing agent. The oxidizing power of SO2 is very weak, and SO2 acts as an oxidizing agent only in a vigorous condition or with a very strong reducing agent. There are only two common reactions in which SO2 acts as an oxidizing agent, and both reactions might not be included in the HKCE syllabus.
(1) Burning Mg(s) in SO2(g): 2Mg + SO2 → 2MgO + S
(2) Reaction of SO2(g) with H2S(g): SO2 + 2H2S → 2H2O + 3S
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