Oxidation & reduction (3) answers

(ii) The oxidation state of copper increases from 0 to +2 so copper has been oxidised and the oxidation state of nitrogen decreases from +5 to +4 so nitrogen has been reduced.(b) (i) In Step 2 iodide ions have been oxidised from −1 to 0 so iodide ions are acting as the reducing agent.(ii) The oxidation state of copper has changed from +2 to +1. (c) Thiosulfate ions are acting as the reducing agent as they reduce elemental...

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