Fantasma4500
International Hazard
Posts: 1681
Registered: 12-12-2012
Location: Dysrope (aka europe)
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Mood: dangerously practical
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Redwine from clear solution and quicker Cu2C2 synth
i recently discussed ways to enchance the production of Cu2C2 with Dornier
my original preparation was adding aluminium to copper chloride solution with HCl in it
this is approx a few minutes to react properly depending on amounts and concentrations
he got to that CuSO4, NaCl and ascorbic acid should be able to reduce the now formed CuCl2 into CuCl -- he was right
the product obtained from simply dumping the hot solution into water, thereafter decanting was pure white, ammonia solution was added to it, where it
turned deep blue
he explained to me that the blue colour was CuCl2 impurities -- so i added some ascorbic acid and it had a few different reactions, forming CuCl and
also some copper, the copper stage was just for some milliseconds and appeared as a brown part in the solution
it turned perfectly clear, supposedly because of the low amounts of CuCl2 in ammonia and CuCl used
seemingly it appears that Cu2C2 that has been in contact with Ca(OH)2 gets totally useless, putting a piece of CaC2 in filter paper and dumping it
into the solution doesnt work either in any way, C2H2 must come from an external source if you want decent Cu2C2 --- anyhow this will just add safety
to the next step
when you get this pure clear solution (which will be pale green to brownish yellow if you have strong concentrations, cant seem to remove the colour
100%) then you can dump in a tiny bit of CaC2, you really dont need much and nearly in an instant it will all turn into a red liquid that you cant see
through, infact resembling red wine quite alot
i decided to post this because i recall having read on a chemistry forum once way back about a person which asked for a experiment to turn ''water
into wine''
and i think i found it
i was pretty amazed at this, surely has 'show potential' supposing im not the only which has people coming to my door once in a while with time on
their hands
credits goes to Dornier for thinking up the method of reducing CuCl2 with ascorbic acid, very efficient and quick method
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Boffis
International Hazard
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Registered: 1-5-2011
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Is the red colour a true solution or a suspension of red colloidal copper acetylide? Could the ascorbic acid be causing the colour by perhaps forming
a complex with the copper acetylide? Does the colour persist for hours or days or does it eventually form a precipitate and settle?
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Fantasma4500
International Hazard
Posts: 1681
Registered: 12-12-2012
Location: Dysrope (aka europe)
Member Is Offline
Mood: dangerously practical
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it will eventually settle, im supposing its either more or less pure Cu2C2, so its actually a suspension but its quite small particles so it appears
to be a solution, although its not clear, as when you dissolve lead salts in tap water
i doubt it forms a complex, i cannot reject it although, but im supposing its mainly Cu2C2 and perhaps even copper metal
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