alleryStart learning →Iron(II) is converted to iron(III) during a redox reaction. What role does the iron(II) play?
AIt is the oxidizing agent
BIt is a spectator ion
CIt is the inert electrode
DIt is the reducing agent
Answer & Solution
Correct answer: D. It is the reducing agent
1. Going from a 2+ charge to a 3+ charge means one electron has been given away.
2. Giving electrons away is oxidation, so the iron(II) is oxidized.
3. The electrons it releases go on to reduce something else in the reaction.
4. A species that causes reduction elsewhere is the reducing agent.
5. The oxidizing agent is the species being reduced, which is a different species here.
_Source: OpenStax Chemistry (CC BY 4.0), Chs 7 and 17, section 17.1 Balancing Oxidation-Reduction Reactions_
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