3 H2O2-I + 2 Fe0 + 6 HCl 2 FeIIICl3 + 6 H2O-II

This is an oxidation-reduction (redox) reaction:

6 O-I + 6 e- 6 O-II (reduction)

2 Fe0 - 6 e- 2 FeIII (oxidation)

Change the oxidation states