Problem: Write a balanced half-reaction for the oxidation of solid iodine dioxide (IO2) to iodate ion (IO3-) in acidic aqueous solution. Be sure to add physical state symbols where appropriate.

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First step in balancing redox half reactions is that try to balance first the non- Hs and Os in the reaction

For IO2 and IO3-, I is already balanced. Next step is balance the O by adding H2O in either of the sides

In this case, we have to add H2O in the reactant side

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Problem Details

Write a balanced half-reaction for the oxidation of solid iodine dioxide (IO2) to iodate ion (IO3-) in acidic aqueous solution. Be sure to add physical state symbols where appropriate.


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