Titration and balancing help

[esig]

I have an unknown sample of iron II I have the mass and I have done the titration with KMnO4.

I mixed the sample with 100 mL of distilled water and then used 25 mL of that and addes 30 mL of distilled water, 30 mL of 3 M H2SO4 and 2 mL of 85% H3PO4.

 

I need to find the balanced equation of the titration but I just can't seem to figure it out

 

I understand that I first need to find the limiting reactant, but this is the one part of the entire report that I am having problems with and I just cant figure it out.

 

Can somebody please point me in the right direction here?

The mass of the iron is 2,2068 g if that matters

 

[Nicholas Kang]

Maybe this can help?

 

http://en.wikipedia.org/wiki/Limiting_reagent

[mississippichem]

You have it backwards OP. In order to find the limiting reagent you need to know the balanced reaction. Take a simple reaction as an example:

 

[ce] 2Na + Cl_{2} \rightarrow 2NaCl [/ce]

 

Once you've tallied the mass of your reagents into moles you can find the limiting reagent. If you have, say, 4 moles of Na but only 1 mole of Cl₂ then how many moles of NaCl can you make?

[John Cuthber]

Start by writing down what the reactants and products are.