Thiosulfate leach

[budzag]

Thanks, I am aware of this I have a tinny little bead of gold that I will test on to see if I can get it dissolved in solution. The starting list will be 1/4 tea spoon of copper sulfate, then I will add 3 tea spoons of sodium thiosulfate, then i will add 3 tea spoons ammonium sulfate and then I will use ammonia as the liquid no water will be added. Will let it sit for a few days then will check the result and see if the bead is reducing in size.

Also what is the ideal pH to cement gold? Why would adding more ammonia rise the pH you would think ammonia would be acidic and would lower the pH

 

[Fettigconstruction1@gmail]

Thanks, I am aware of this I have a tinny little bead of gold that I will test on to see if I can get it dissolved in solution. The starting list will be 1/4 tea spoon of copper sulfate, then I will add 3 tea spoons of sodium thiosulfate, then i will add 3 tea spoons ammonium sulfate and then I will use ammonia as the liquid no water will be added. Will let it sit for a few days then will check the result and see if the bead is reducing in size.

 

[Fettigconstruction1@gmail]

The stainless only gets eaten when the voltage is to high. Above 3.5 volts your stainless starts going. I did it so I would know. Now have nickel and cadnium in the junk so gonna try and figure out how to get it out. Hoping it didn't make a complex with the thiosulphate and is sitting on the bottom in the sludge.

 

[Yggdrasil]

Also what is the ideal pH to cement gold? Why would adding more ammonia rise the pH you would think ammonia would be acidic and would lower the pH

Ammonia is a alkali NH₃OH and as such has a pH similar to NaOH 13-14 ish
Cementing only needs an "active" solution , either high or low pH.

 

[budzag]

Ammonia is a alkali NH₃OH and as such has a pH similar to NaOH 13-14 ish
Cementing only needs an "active" solution , either high or low pH.

Thank you. So in your eyes would it be better leach in a full blown ammonia solution 13- 14 pH or would you go the other way say with a full blowen Sulfate of ammonia solution an try get it as acidic as possible. As I was adding sulfate of ammonia to the ammonia it was lowering the pH so it seems like the 2 were conflicting with each other? Hmm

 

[budzag]

The stainless only gets eaten when the voltage is to high. Above 3.5 volts your stainless starts going. I did it so I would know. Now have nickel and cadnium in the junk so gonna try and figure out how to get it out. Hoping it didn't make a complex with the thiosulphate and is sitting on the bottom in the sludge.

Ok thanks I didn't have a choice with the voltage as even with the ajustable power supply it wouldn't drop the voltage it was weird the amps shoot up and I can lower below a certain amount. Volts or amps