[Shinnya]

Hi,

I have been mixing my PO for Pt/Pd developer for some time now. I mix 2lb of Potassium Carbonate and 1.75lb of Oxalic Acid. Whenever I make the solution, pH seems to be higher like 7 to over. I usually end up adding more Oxalic Acid when I use it to lower pH.

Chemistry is not my background, but I was wondering if I could add more Oxalic Acid when I mix it in the first place. If I use the same amount, could I make a solution with lower pH?

Also,by mixing this, what % solution do it get? I would like to know how to calculate that. If you could tell me the basics, I will find out from textbook...

Thanks as always.

Warmly,
Tsuyoshi