The OP mentioned washing the silver oxide a bunch before adding the sucrose. That's why it wasn't working well. No strong base left! I mentioned that in my long post; the strong base is required to hydrolyze the sucrose.
What to do with the Copper Nitrate
- Thread starter ModernAlchemy
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That’s exactly what happened. I was thinking oh man!! Why did I wash the silver oxide.. problem solved!! Thank you!! happy holidays
I clearly missed that. My apologies.
Basic enviroment helps to reduce the ammount of sugar you use very significantly. If it were run in near neutral, like Tollens reaction, you would need whole equivalent of sugar for 2 silver equivalents (molar).
Thank you all for helping me sort out what I clearly did wrong. I will try again. Have a wonderful holiday.
Not a problem. I did the same thing when I first tried the reaction. But, I only tried it with a tiny test tube first, so it minimized the problem and let me fix it without too much frustration.
I always do a new chemical procedure on a small scale first, to work out all the kinks in the process before I commit to a large volume.
Thank you Alondro, good advice!
Thomas M Joseph
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- May 2, 2023
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Very good advice!
Martijn
Well-known member
That is the good lab practice we have been promoting here.
If only to aviod big unknown runaway reactions. Experiments are to be done in test tubes first. As acquaintance tests should.
Cant be repeated enough. It would save tons of problems to solve.
I used to work in a biochem and genetics lab. We always did it this way. Some of the stuff we dealt with was far more dangerous than even concentrated acid.
I think the nastiest thing I ever had to use was shigatoxin. Nervous as heck dealing with something so lethal.
I simply throw thin aluminum into the copper nitrate solution.
As a rule, these are housings from old relays, at first I use them to convert silver from chloride, and then when they are used they also displace copper.
Somehow the alkali and sugar did not impress me.
after reducing chloride with aluminum, cleaning with alkali and melting, they buy silver from me as 990 standard.
I don’t know if I’ll be able to fuse this copper later, I don’t even know what the correct name for this remainder is.
there was a lot of nickel in this solution, the contact holders were made of nickel silver alloy
As a rule, these are housings from old relays, at first I use them to convert silver from chloride, and then when they are used they also displace copper.
Somehow the alkali and sugar did not impress me.
after reducing chloride with aluminum, cleaning with alkali and melting, they buy silver from me as 990 standard.
I don’t know if I’ll be able to fuse this copper later, I don’t even know what the correct name for this remainder is.
there was a lot of nickel in this solution, the contact holders were made of nickel silver alloy
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Martijn
Well-known member
I've had acceptable results with smelting copper powder from the stockpot and copper cell with soda ash as a flux.
Rinsed the powder until wash water was pH 7 and almost no hydroxides showing with a pH 11 drop test.
Nickel does not cement on iron, if i understood that right. So that will stay in the hydroxides when treating waste.
Rinsed the powder until wash water was pH 7 and almost no hydroxides showing with a pH 11 drop test.
Nickel does not cement on iron, if i understood that right. So that will stay in the hydroxides when treating waste.
It’s there a soda ash weight to copper weight ratio or did you just cover it Martiajn?
