rherzal - 5-8-2017 at 03:46
one day i found some thin copper wire from an old ceramic resistor, i put it in some dilute HCl(i bought it as a descaler) along with some H2O2 and
left it there for a week . after that week the wire disappeared and i was left with a clear blue solution. i wanted to precipitate the Cu+2 ions and i
added some Na2CO3 , but something brown precipitated alongside the blue copper ions .is it possible that the wire was an iron-copper alloy instead of
copper ?
XeonTheMGPony - 5-8-2017 at 04:20
if it was a wire wound resister it was not pure copper.
rherzal - 5-8-2017 at 06:25
Good to know.
XeonTheMGPony - 5-8-2017 at 06:50
If making reagents the copper in house wiring is fairly pure, use that in the future. If making copper sulfate add high test peroxide to it and warm
it, will react vigerously so you won't have to Waite as long between steps
unionised - 5-8-2017 at 09:49
It's possible- even likely- that the wire is a copper/ nickel alloy containing a little iron or manganese
as an impurity.
https://en.wikipedia.org/wiki/Constantan
https://en.wikipedia.org/wiki/Manganin
It may even be this
https://en.wikipedia.org/wiki/Nichrome
which isn't a copper alloy.