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11 March, 01:34

Which of the following are oxidation half-reactions?

Cr2O72 - → Cr3+

MnO4 - → MnO2

Fe2 + → Fe3+

Cl - → Cl2

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  1. 11 March, 02:33
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    The answer is the third choice because is oxidation half reactions, only the oxidation state of the reducing agent changes; in this third choice, Fe2 + is oxidized and becomes Fe3+. Just keep in mind that half reactions usually include the change in electrons:

    Fe2 + - > Fe3 + + e-
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