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Balance the following redox reaction by ...

Balance the following redox reaction by using oxidation number method.
`MnO_(2)+Br^(-)toMn^(+2)+Br_(2)+H_(2)O` (acid medium)

Text Solution

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Oxidation `underset(-1)(2Br^(-1))overset(2xx1"unit")(to)underset("zero")(Br_(2))]xxcancel(2)^(1)`
Reduction `MnO_(2) overset(1xx2"unit")(to)underset(+2)Mn^(+2)]xxcancel(2)^(1)`
______________________________________
`MnO_(2)+2Br^(-1)toMn^(+2)+2B_(2)`
Balancing Hydrogen and Oxygen by adding `H_(2)O` molecules and `H^(+)` ions
`MnO_(2)+2Br^(-1)+4H^(+)toMn^(+2)+Br_(2)+2H_(2)O`
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