[garethtzf]

Does anyone know the orders of reaction of 2Fe(NO3)3 + 3Na2S2O3 = Fe2(S2O3)3 + 6 NaNO3?

[Arkcon]

Greetings, garethtzf:, I can see that you're new, and I'd like to welcome you to the Chemical Forums.  I'd like to remind you to read our Forum Rules{click}.  You agreed to these rules as a condition of signing up for our forum, and they apply to you, whether you agree with them or not, or even if you're unaware of them.  We want to see your work solving this problem.

Here's how Order of reactions is determined: https://en.wikipedia.org/wiki/Order_of_reaction#Determination_of_reaction_order

Did you try any of those?  What did you get?  If you didn't, or can't, why do you need to know the order of reaction?  What will you use the information for?

Someone else, recently, wanted to know reaction kinetics, to determine industrial amount produced.  That is, likewise, not really what we use kinetics for.