@Qwerty: Lol, my method is exactly the same as Tavrobel's except I didnt go into detail.

Unless if you mean you're going to do the stochiometry.

What I was just saying is to make the percentage Tavrobel mentioned as 100% otherwise it just complicates the matter pointlessly. Just get a lot of water and submerge it all in that or do LB's method. Obviously youve gotta measure stuff accurately using mass balances and perhaps a burette or measuring cylinder type thing.