11/27/2023 0 Comments Precipitate gold powder![]() You can test to see if your solution still contains chlorine, heat it until vapors come off of your solution, fill the cap off of a bottle of ammonia about half full (the ammonia will have a clear fumes you can smell), hold the capful of ammonia in the path of the fumes leaving your heated solution, let the two fumes mix, if the clear fumes from both mixtures form a white cloud of fumes when mixed, it proves chlorine gas in your solution, the white cloud is made when clear chlorine fumes and the clear ammonia fumes combine to form the white cloud of ammonium chloride gas. Heat will drive off the chlorine gas, but can also concentrate solution, so if you have to add much heat you may want to dilute it afterwards to redissolve the salts. It is possible that you can use so much bleach that you basically, destroy all of the HCl acid and actually just make a basic hypochlorite and salt solution in water. There can be more than one problem of using too much bleach, the bleach is basic (opposite of an acid) it will turn some of your HCl into salt sodium chloride NaCl, the bleach sodium hypochlorite is made basic with sodium hydroxide NaOH, to keep the chlorine in solution, when you mix it with HCl acid some of the acid is consumed, neutralized by the sodium hydroxide in solution, as the acid converts the hypochlorite to chlorine gas, the bleach being mostly water (over 90%) dilutes this solution keeping most of the salt NaCl dissolved, until you go to heat and or evaporate solution, where you can begin to have much the sodium metal salt form a white precipitant. We don't have a problem answering a few questions as long as you working to learn. Thanks, DaveĮveryone here is glad to help those who do study and are trying to learn. I am one who helps others by spending numerous hours researching and experimenting and then passing on my knowledge to them. I believe forums are for people to help others and hopefully to save them from having to go through the lengthy processes that I go through. If anyone can help it would be greatly appreciated and I will be happy to help others as I learn the process. The SMB fizzes and drops to the bottom of my solution. I have read through the forum and found that I may have used too much bleach and that I should heat it to remove the excess bleach. My problem is that I dissolved gold from plates and cups in HCL and bleach but cannot precipitate it with sodium metabisulfite. I have successfully recovered gold from computer bits and pieces. I have just started processing gold and have read through Hokes book. Hello! I am posting this at my own risk and will remove myself from the forum if I'm found to be a problem.
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