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Oxidation-Reduction 5. Decide whether each of the following reactions is an oxidation-reduction reaction Explain. For those that are redox, tell which element is oxidized, which element is being reduced, which substance is the oxidizing agent (oxidant, oxidizer), and which substance is the reducing agent (reductant, reducer). 302o) → 2Al,03(s) + H,SO. (aq) → Baso,(s) a) 4 Al (.) + BaCl2 (aq) b) 2 HCI (aq) + 4 (aq) 23 (aq)

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