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Answer to Question #20308 in Inorganic Chemistry for aya

Question #20308
please can you just tell me each of these reactions are oxidation or reduction :
1-extracting metals in blast furnace
2-butter going rancid
3-electroplating
3-rusting
4-combustion
5-respiration
6-paint drying
7-fireworks and rockets
Thank you for your help and am waiting your answer
Expert's answer
1-reduction (for example, in reaction: Fe2O3 + 3CO = 2Fe +3CO2. there is a reduction of iron with carbone monoxide)
2-oxidation (slow oxidation non-saturated compounds of butter by air oxygen)
3-reduction (for example, in reaction: Cu2+ + 2e- = Cu. there is a reductionof copper by current)
4-oxidation (for example, in reaction: 4Fe + 3O2 = 2Fe2O3. there is a oxidationof iron by oxygen)
5-oxidation (the inner oxidation of various organic compounds in cells by
oxygen)
6-oxidation (slow oxidation of paint by air oxygen)
7-oxidation (fast oxidation of various compounds by strong oxidizing agents or
oxygen)

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