• To participate in the 911Metallurgist Forums, be sure to JOINLOGIN
  • Use Add New Topic to ask a New Question/Discussion about Leaching.
  • OR Select a Topic that Interests you.
  • Use Add Reply = to Reply/Participate in a Topic/Discussion (most frequent).
    Using Add Reply allows you to Attach Images or PDF files and provide a more complete input.
  • Use Add Comment = to comment on someone else’s Reply in an already active Topic/Discussion.

FeEDTA Concentration (1 reply and 1 comment)

4 months ago
Seeker 4 months ago

For gold dissolution in Sodium Thiosulfate solution, I have to add FeEDTA at a concentration of 0.002 mole/L. I have with me Ferric sulfate and EDTA (Ethylenediaminetetraacetic acid) separately. Please advise me how many grams of ferric sulfate and EDTA I have to dissolve into the solution respectively.


Jorge Ganoza
4 months ago
Jorge Ganoza 4 months ago
1 like by David

I can suggest the following quantities,

- First, dissolve 33.3 g of disodium EDTA in 500 ml of water (@ 30 C), containing 100 mL of 1N sodium hydroxide.

- Second, dissolve 24.9 g of FeSO4.7H20 in 300 ml of hot water (@ 70 C), containing 4 mL of 1N sulfuric acid.

- Mix both solutions, add water to get approximately 1000 mL. Make sure the solution is homogeneous. 

The final solution contents 5000 mg of Fe per liter


4 months ago

Thanks a lot for your advice. Could you please suggest a simpler way for this?

Please join and login to participate and leave a comment.