Re: copper oxide

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Steve by way of Terry Fritz <twftesla-at-qwest-dot-net>" <steve-at-g8cyerichmond.freeserve.co.uk>

When pure copper is deposited in electrolysis it can for a pink spongy form,
it depends on the specific conditions, principally current and the
concentration of the initial ions in the solution plus the presence of other
ions.
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Wednesday, February 06, 2002 10:47 PM
Subject: Re: copper oxide


> Original poster: "Steve Greenfield by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <alienrelics-at-yahoo-dot-com>
>
> He didn't say he wants copper oxide, he wanted to know
> why he wasn't getting it. At least one form of Copper
> Oxide -is- green. The only form of copper I've seen
> turn black was brass when Liver of Sulfur was applied,
> and in that case it may be the zinc (is there tin in
> brass?) turning black.
>
> The oxygen would come from the H2O breaking down, as
> stated due to elecrolysis.
>
> Can copper form a chloride? Well, yes, and I think it
> is green, isn't it? I think it is just etching the
> copper surface away and forming tiny crystals of pure
> copper, as another poster suggested.
>
> To the original poster: Is there enough of the pink
> growth to test it's conductivity? If it is an oxide or
> a copper salt, it should be nonconductive once dry.
>
> And further to the original poster: neither electrode
> can be considered the cathode because you are applying
> AC to them. It may be that you -meant- it to be the
> cathode, but it is not acting as a cathode because it
> is emitting and collecting electrons on alternate
> cycles.
>
> Steve Greenfield
>
> --- Tesla list <tesla-at-pupman-dot-com> wrote:
> > Original poster: "rheidlebaugh by way of Terry Fritz
> > <twftesla-at-qwest-dot-net>" <rheidlebaugh-at-zialink-dot-com>
> >
> > Brass is not copper, but a mixture of copper and
> > other metals mostly zinc.
> > Salt is a chloride not an oxide. Your mixture was a
> > mix of copper, zinc,
> > sodium chloride and some other metals. The copper
> > oxide you want is nearly
> > black. Burning the pure copper is the easiest way to
> > get it. Excess heat
> > will flake it off.
> >   Robert  H
> >
> > > From: "Tesla list" <tesla-at-pupman-dot-com>
> > > Date: Tue, 05 Feb 2002 18:18:28 -0700
> > > To: tesla-at-pupman-dot-com
> > > Subject: copper oxide
> > > Resent-From: tesla-at-pupman-dot-com
> > > Resent-Date: Tue, 5 Feb 2002 23:16:59 -0700
> > >
> > > Original poster: "by way of Terry Fritz
> > <twftesla-at-qwest-dot-net>"
> > > <RQBauzon-at-aol-dot-com>
> > >
> > > For my sci. project, I hooked a copper anode to a
> > TIC and made a grounded
> > > brass
> > > anode.  They were dipped in a saltwater solution.
> > The anode bubbled
> > furiously
> > > as a result of electrolysis and the cathode
> > developed a pink growth
> > instead of
> > > the desired green copper oxide.  What could the
> > pink stuff be?
> > >
> > >
> > >
> > > Thanx,
> > >
> > > Me
> > >
> > >