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

the oxidizing agent is

is it Fe?

Loss of electrons is oxidation.

Gain of electrons is reduction.

So the oxidizing agent is the one reduced.
Look at Fe^+2 ==> Fe^+3 + e
Is Fe^+2 reduced?

To determine the oxidizing agent in a chemical reaction, we need to identify the element or compound that undergoes reduction. In this case, the reaction you mentioned is the oxidation of iron(II) ion (Fe2+) to iron(III) ion (Fe3+).

The species that gets reduced is the oxidizing agent. Therefore, in this reaction, hydrogen peroxide (H2O2) is the oxidizing agent, as it causes the iron(II) ion to lose electrons and be oxidized to iron(III) ion.

To understand why hydrogen peroxide acts as the oxidizing agent, you should know that it has a higher ability to accept electrons compared to iron(II) ion. During the reaction, hydrogen peroxide gains electrons, which causes the iron(II) ion to lose electrons.

So, the answer is hydrogen peroxide (H2O2) is the oxidizing agent in this reaction.