cyanureeves
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urea and hydrogen peroxide dissolving silver?
i made the cyanide synthesis fusing charcoal,urea and sodium carbonate following the thread on preparation of cyanides, although i'm sure i failed
because i ran out of charcoal fuel. but anyway i filtered the salts and tried to dissolve gold and silver with it.i read that cyanide reactions are
sped up using oxygen or peroxides so i added store bought peroxide and it is just eating away my silver. i now have a milky solution but can clearly
see bits of sponge looking silver bits.i took a seperate piece of silver i use for plating which is covered with an oxide coating and put it in pure
urea and some hydrogen peroxide and the oxide was attacked immediately.does urea and hydrogen peroxide dissolve silver?i also have a piece of gold i
use as plating anode and has a black coating and the coating is being attacked for about three hours now by the salt/peroxide solution
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not_important
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Not to my knowledge. Cyanide forms soluble complexes with silver, gold, and a number of other metals. Tthe H2O2 just speeds up the oxidation of the
metal to the ion which gets complexed, that's why the oxide coating went so fast.
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cyanureeves
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if i am indeed making a silver sponge then i must have a silvercyanide compound in solution.boy if i do i will be one happy plating fool.cyanide is
king for plating.even the cyanates! i'm just being surprised more and more by hydrogen peroxide.the black coating on the piece of gold comes from
potassium cyanate solution using a gold anode. i got no idea what it is. it builds up when i use it to deposit gold into my solution.i guess it's
carbon.if it ain't the coveted compound then i got one hell of a cleaner.
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cyanureeves
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correction the piece of gold is used as cathode.
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