I think the answer is that it didn't "stabilize" and remained highly
reactive until other elements came along.
An ion isn't going to change if there's nothing there for it to change
*with*
Any little thing would have "kicked" it and eventually something did.
Perhaps after the OH[-] anion reaches its saturation point in water, it
starts to outgas, abandoning its potential partner in AgOH.
The Ag ions that exceed the ability of water to hydrate them will then be
like a "free agent" or an orphan, too small to sink, nothing there to react
with.
Agreed that 26 uS is about a max, and that's also where the plots start
to deviate, but the voltage drop with constant current doesn't deviate
*much* off linear till 30 uS where it goes nearly flat.
Perhaps at that point, *if* the OH [-] is not building up due to out
gassing, the Ag[-] is only adding half the conductivity increase that both
were once providing....and ....Hydroxide particle formation is accelerated
[which would by itself account for a flat voltage reduction line, but it
isn't flat, just nearly flat ]
I have not found an upper limit to conductivity...just patience. 79 uS
took several days.
I have also not been able to repeat it with ten tries, but maybe the 11th
would be the one.....who knows.
I quit trying as it's way too iffy and unstable to be useful.
Brewed in a closed, but not "sealed" container. The lid was a weighted
cover [the generator] with very little head space volume for air to be in
that could have acted like a check valve of sorts to keep a positive
internal pressure slightly positive..maybe in a low pressure weather
zone? I dunno.
I'll call it an accident...an exception to d-rool, showing we don't know
it all.
Flukes happen often enough to name an electronic instrument company after
them. [wink]
ode
At 11:56 AM 10/23/2008 -0400, you wrote:
Ode Coyote wrote:
I made a quart batch that metered at 79uS when done, dropped to and
stayed at around 40 uS for about 4 years on the sill.
I have no idea what the PPM was...probably over 100.
Crystal clear in the shade, looked like dilute milk in the sunshine.
Well, I don't see how it could have been silver oxide and silver
hydroxide, both have a solubility limit of around 13 ppm, for a total
maximum for both of around 26 ppm. Maybe there was some silver nitrate
(was the water exposed to air during a smoggy or stormy day), or silver
carbonate, from absorbed carbon dioxide? How long was it open to the air
while brewing. There is effectively no limit to the ppm of silver
carbonate generation if brewed very very long with exposure to air, since
the carbon dioxide absorbed by the water becomes silver carbonate,
allowing more carbon dioxide to be absorbed. Were you brewing inside
while cooking with a gas or wood stove, or heating with wood or an
unvented gas heater. All those can increase the carbonate formation
tremendously.
Marshall
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