[Sayood_93]

AHHHHHHHHHHH,

in the equation we put red = reduced form and oxd = oxidized form, not whats being reduced and whats being oxidized.

Could you also say
red = reducing agent
oxd = oxidizing agent
?

Therefore H2O2 being the oxidized form goes as the denominator!

So the answer is 0.128 mol/L !

[Borek]

in the equation we put red = reduced form and oxd = oxidized form, not whats being reduced and whats being oxidized.

Yes.

Could you also say
red = reducing agent
oxd = oxidizing agent
?

Oxidizing form is usually the one that does oxidizing, so it will work as well.

Therefore H2O2 being the oxidized form goes as the denominator!

Yes.

So the answer is 0.128 mol/L !

Yes. What you did in the very first post was you used wrong version of the equation AND you put the reversed forms in the equation - and as both errors are equivalent of flipping the sign, they canceled out.

[Sayood_93]

Yeah I understand, thanks a lot !