In the following reaction: 3Br2 +6CO32- + 3H2O → 5Br-1 + BrO3-1 + 6HCO3-1
Correct answer: B. bromine is both reduced and oxidized
- A. bromine is reduced and water Is oxidized
- B. bromine is both reduced and oxidized
- C. bromine is oxidized and carbonate is reduced
- D. bromine is neither reduced or oxidized
Explanation
The oxidation state of bromine in Br2 is 0. It is reduced to bromide ion where its oxidation number is -1 and it is oxidized to BrO3-1 where the oxidation state of bromine is +5. Oxidation states of hydrogen, carbon, and oxygen remain the same. So, the option is correct.
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