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Make Copper Formate (for Making Copper Conductive Ink) (Patreon)

Published:
2018-05-01 02:43:33
Imported:
2021-10

Content

Final version. 

I put in the sodium carbonate type as suggested earlier. 

Files

Make Copper Formate (for Making Copper Conductive Ink)

In this video we make copper formate, a useful precursor to copper conductive ink. We simply dissolve 65g of copper sulfate in 250mL of water and 33g of sodium carbonate in 150mL of water. Then we mix the two together. Copper carbonate hydroxide precipitates and we filter that off. Then we react the copper carbonate hydroxide with formic acid to create copper formate. Copper formate has the useful property that it decomposes into copper metal (along with carbon dioxide and hydrogen) when heated. The copper produced this way isn't well bonded and not very conductive. But in upcoming videos additives may be added to improve the quality of the product. Related videos: Silver conductive ink: https://www.youtube.com/watch?v=EBlqPS8boLI Copper sulfate: https://www.youtube.com/watch?v=5dUSF9Gl0xE Formic acid: https://www.youtube.com/watch?v=ceL-I0azPH8 Donate to NurdRage! Through Patreon (preferred): https://www.patreon.com/NurdRage Through Bitcoin: 1NurdRAge7PNR4ULrbrpcYvc9RC4LDp9pS Glassware generously provided by http://www.alchemylabsupply.com/ Use the discount code "nurdrage" for a 5% discount. Social media links: Twitter: https://twitter.com/NurdRage Facebook: https://www.facebook.com/NurdRageYoutube/ Instagram: https://www.instagram.com/nurdrageyoutube/

Comments

Backonninja

I have a problem. I'm trying to strip the silver off of some silver-plated tableware. The problem is that I can't use nitric acid (landlord has a very definite NO on it). The permagonate ion ( [MnO4]- ) is able to dissolve silver, but the only form that it's easily available in is potassium permagonate (KMnO4). This is a problem because the potassium would prevent the permagonate from dissolving the silver (to my knowledge). Anyone able to help?

NurdRage

While it is possible, the silver on silver plated objects is very little, you'd waste so much more money, time and effort than simply just buying silver directly. But if you still want to do it. Cyanide is well-known for dissolving silver, unfortunately it's deftly poisonous. Thiourea and thiosulfate are other options but they're quite slow.

Anonymous

How do you confirm the identity and purity of the final product?

NurdRage
>>11983100

A combination of analysis including melting point, elemental analysis, chromotography and mass spec are the usual approaches. For more specific compounds you can use derivization, titration and reactive tests. I'd imagine copper formate to be responsive to redox titration and complexometric titration.

Backonninja
>>11975464

Thanks! This has been giving me trouble for a while now. I have one other, completely unrelated, question. Have you heard of the Griesheimer process? It's used for producing potassium metal. It's mentioned here ( <a href="https://en.m.wikipedia.org/wiki/Potassium" rel="nofollow noopener" target="_blank">https://en.m.wikipedia.org/wiki/Potassium</a> in the commercial production section) and sparingly by name in literature, but there's no meaningful information on it available. This is mainly just a curiosity of mine.