[alt-photo] Re: Stoichiometry for the nonscientist

[David Ashcraft]

OK - What if I needed to mix a formula like: 180 gms potassium oxalate  
K2C204.H2O mixed with water to make 1 liter.  I only have potassium  
carbonate and oxalic acid on hand.

I know that I can make this formula of potassium oxalate by mixing  
potassium carbonate and oxalic acid; PC is K2CO3 and OC is C2H204.   
Now how would I know how much of each of these to make up my original  
formula?

David