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naveenchary

Member
Joined
Nov 8, 2017
Messages
9
I dissolved 1gram gold in aqua Regia then heated to 120f then added urea until no fizzing then added 2grams smb after 4 hours I got only 50milligram gold only why and this is not a spam ok
 
Two reasons...

1. You made some mistake along the way and didn't recover all the gold. Check solids left over and do a stannous test on the remaining solution.

2. You didn't have 1 g of gold to start with. 50 mg out of a gram is 1/20 of the starting material. Did you dissolve some gold filled?

Göran
 
You will find urea is out of favor. It was on this forum I found that out. And that if you need to denoxx (drive off or neutralize excess nitric there are better methods. If you test your solution with stannous as has been suggested here, you may find there is still gold in solution due to left over nitric despite the urea.

Just suggesting a possible explanation.
 
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