oxidation

In the reaction of hydrogen peroxide with iron (II) ion in acidic solution to form iron (III) ion and water,
the oxidizing agent is... ?

Fe(II) ==> Fe(III)
H2O2 ==> H2O.
Fe goes from +2 to +3, that is a loss of electrons, so it is oxidized (by definition, oxidation is the loss of electrons).
The oxidizing agent is the substance doing the oxidizing. What is in the solution that oxidizes the iron form +2 to +3? That is your answer.

H2O2

hydrogen peroxide

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  1. hydrogen peroxide is the oxidizing agent

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