The silver comes off the electrode as ions with a + charge.
The other electrode produces OH- anions
If an ion finds an anion it makes a silver hydroxide particle
If it finds an Oxygen atom..silver oxide
If it picks up an electron from an air/water/electrode interface or jar
surface...metallic silver particle
None of the particles have a repelling charge other than a very weak
negative Vandervals force easily overcome by kinetic collisions.
Over saturation of ions, very high concentrations mostly in localized
zones, mostly in the very tight Nernst Diffusion Layer at the electrode
surface, will force the growth of crystals around a particle as its
nucleus..usually an oxide particle.
I think it takes at least 1.2 volts to make silver ions.
Ode
At 05:43 PM 10/2/2010 +1030, you wrote:
What about 'repelled?' If I understand the process correctly, doesn't it
require a minimum voltage to cause the silver to be 'repelled' from the
electrode in the form of ions?
As those ions are in constant rapid movement in the water {I believe
that's called Zeta potential} they collide with each other and some
'stick' to each other {I believe that's called van der Waals force of
mutual attraction/repulsion} forming atomic clusters of those silver
ions...commonly referred to as 'particles', and as some may collide more
than others that's where larger 'particles?' are formed.
Howzat Sir/Maam? Am I close? Do I get a star? <g>
N.
> Date: Fri, 1 Oct 2010 20:36:03 -0700
> From: [email protected]
> Subject: Re: CS>Silver particles on bottom of jar
> To: [email protected]
>
> Hi Dan. Thanks for that information. I was using (and have been, for
years) a
> term that is used in my CS manual for describing the process by which
silver
> particles leave the electrodes. Oddly enough -- when I Googled it,
they didn't
> even have that word spelled that way. They have he word *sinter* --
and it does
> have a different meaning, you're right. I will check a dictionary as well.
>
> So -- OK -- large particles of silver aren't disseminated (howzat?)
from the
> electrodes *as* large particles, but the rapid dissemination results in
> agglomeration which becomes large particles. Right?
>
> MA
>
>
>
> ----- Original Message ----
> > From: Dan Nave [email protected]
> >
> > First of all, "scinter" or "scintering" is the wrong word for what you
> > are trying to describe. It is inappropriate to use that word in this
> > context. Look it up in a dictionary, or Google it.
> >
> > Even so, I don't believe that large particles of silver are undercut
> > and break off the electrodes in any significant way.
> >
> > On Tue, Sep 28, 2010 at 7:34 AM, MaryAnn Helland
> > <[email protected]> wrote:
> > > Hi Jan. Usually when there is silver laying at the bottom of the
jar, that
> > > is silver that scintered off the silver bars too fast, and is
therefore too
> > > large-particle to remain suspended in the distilled water. It
could have
> > > been aided by some kind of film on the interior of the jar, or
something
> > > less than perfect in the distilled water.
>
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