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Oxidation Reduction

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I need help with oxidation and reduction for organic compounds and calculation of oxidation levels. Please see attachment.
1. Label each transformation below as oxidation, reduction or neither oxidation nor reduction. Show evidence (calculation of oxidation levels) to support you answer.

2. Rank the following compounds in order increasing oxidation level. Place the number rank (1= lowest; 4=highest) in the blank below the structure and show your calculation for oxidation level.

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Oxidation is loss of electrons (gain of oxygens or loss of hydrogen usually).
Reduction is gain of electrons (gain of hydrogens or loss of oxygen usually).

"LEO says GER." That's how I always remembered it. "LEO" = loss of electrons is oxidation. "GER" = gain of electrons is reduction.

Anyway, alkanes are the most reduced form of carbon.
Then comes alkenes, alcohols and alkylhalide.
Then comes alkynes, aldehydes, ketones, and ...

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