Homework Answers
1. Hydrogen is removed and oxygen is added to the carbon atom. So, carbon is oxidized.
2. The oxidation state of Sn changes from +2 to +4. So, Sn loses two electrons. Hence it is oxidized.
3. The oxidation state of chromium changes from +3 to 0. So, it is reduced.
4. The oxidation state of oxygen changes from 0 to -2. So, it gains two electrons. So, it is reduced.
5. The oxidation state of mercury changes from +1 to 0. So, it gains one electron. So, it is reduced.
6. The oxidation state of aluminum changes from 0 to +3. So, it loses 3 electtons. So, it is oxidized.
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