[nir]

Well, I did a lab recently and it involved synthesizing trisoxalatoferrate(III) n-hydrate (tri in this case). I'm trying to figure out the balanced equation so that I can determine the theoretical yield. I'm writing the reactants on both equations just from what my lab says, so I don't know if they are exactly correct.

All I really need to figure out FeC2O4 2H2O relationship to the product trisoxalatoferrate(III) trihydrate

So far I have:
Fe(NH₄)₂(SO₄)₂ 6H₂O (aq) + H₂C₂O₄ (aq)  -> FeC₂O₄ 2H₂O (ppt)  + 2NH₄⁺(aq)  + 4H₂O

The second step is where I'm not quite sure what how to balance it...

FeC₂O₄ 2H₂O (ppt) +  H₂O₂ (aq) + K₂C₂H₂ (aq) + H₂C₂O₄ (aq)  -> K₃Fe(C₂O₄)₃ 3H₂O (aq)  + something

I'm not quite sure but I was thinking:
 FeC₂O₄ 2H₂O + H₂O₂ +  3/2 K₂C₂O₄ +1/2 H₂C₂O₄ -> K₃Fe(C₂O₄)₃ 3H₂O (aq) + OH^-

Anyone have any thoughts on this?