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Question: In the following reaction, \[3Br_{2} + 6CO_{3}^{2 -} + 3H_{2}O = 5Br^{-} + BrO_{3}^{-} + 6HCO_{3}\]...

In the following reaction,

3Br2+6CO32−+3H2O=5Br−+BrO3−+6HCO33Br_{2} + 6CO_{3}^{2 -} + 3H_{2}O = 5Br^{-} + BrO_{3}^{-} + 6HCO_{3}

A

Bromine is oxidised and carbonate is reduced

B

Bromine is reduced and water is oxidized

C

Bromine is neither reduced nor oxidized

D

Bromine is both reduced and oxidized

Answer

Bromine is both reduced and oxidized

Explanation

Solution

3Br20+6CO32−+3H2O→5Br−−1+BrO3−+5+6HCO3\overset{0}{3Br_{2}} + 6CO_{3}^{2 -} + 3H_{2}O \rightarrow \overset{- 1}{5Br^{-}} + \overset{+ 5}{BrO_{3}^{-}} + 6HCO_{3}.

In this reaction bromine is oxidised as well as reduced.