Is this the correct working out? (Redox)

[kenhung123]

2Fe2+ + H2O2 + 2H+ => 2Fe3+ + 2H2O

I need to show which is oxidant and reductant

Fe2+ oxidation number increase from +2 to +3 therefore is the reductant
H2O2 oxidation number increase from -1 to -2 therefore oxidant

Ok the first part is quite straight forward but the 2nd part I really worked with Oxygen from -1 to -2. Do I say H2O2 decreased in oxidation number or just say specifically Oxygen decreased in oxidation number. I think oxygen by itself in H2O2 can't be an oxidant anyway?

[Studyinghard]

You say Oxygen decreased in oxidation number therefore reduction. but you say that H2O2 is the OXIDANT. you dont say only oxygen is the oxidant.

[kenhung123]

So I need to say 2 things:
The element that is goes through oxidation/reduction (oxygen in this case) because it increased/decreased in oxidation number and therefore the molecule (H2O2) is the oxidant/reductant?

Is there a simpler way to show working for this?

[Studyinghard]

Show working ? as in the oxidation numbers decreasing and increasing? If so, I think its just writing the numbers on top of the equation but I don't think theres a simpler way.

[TrueTears]

You say Oxygen decreased in oxidation number therefore reduction. but you say that H2O2 is the OXIDANT. you dont say only oxygen is the oxidant.

spot on.

[shivesh.varmaxD]

yes, show your oxidation numbers on top of the formulas in the equation, state which elements (and which compounds they experienced this change in) had a change in oxidation number, and then name the compound that was the oxidant/reductant).

For this example, I'd word it as:

"oxygen's oxidation number decreased from -1 in H2O2 to -2 in H2O, indicating that H2O2 is the oxidant and underwent reduction"

ticks all the boxes.

[kenhung123]

Thanks for the help!