[travis]

I'm trying to oxidize sodium sulfite to create sodium sulfate, How can I tell if I have succeeded or not?
I've used hydrogen peroxide and sodium hypochlorite. How do I know sulfite from sulfate. Please help

[enahs]

Qualitatively you can tell just by smell. Which is the easiest way if you do not have access to the fancy equipment.
Sodium Sulfide has a "rotten egg", sulfur odor. Sodium Sulfite is odorless.

If you want determine quantitatively how much you obtain, other methods will be required. Look into separation of mixtures.

[Borek]

Sulfide, sulfite, sulfate 

[enahs]

Sulfide, sulfite, sulfate 

I clearly do not know how to read. Or, I just like to answer questions similar to ones people ask, but not exactly, to confuse them even more. Either way you look at it, I suck.

[enahs]

Back to answer the original question, to do that without any fancy equipment, a easy method would be to measure the specific gravity, as Sulfite is nearly twice that of sulfate, and it is easy to measure, generally.

[travis]

thank you, that solves part of my problem. I am clearly starting with sulfide. I will do some more research now, however please advise if you like. In my defense I was told by the resource I got it from it was a sulfite. But it definately has a high sulfur smell to it.

[hmx9123]

Sulfates are pretty easy to come by.  Can you not just purchase what you need at the store or produce it by selective precipitation?

[AWK]

You can separate barium sulfate. Add some BaCl2 or Ba(NO3)2 to your oxidized sample together with diluted HCl or HNO3. BaSO4 is insoluble in this conditions