CO2 forms carbonic acid and will lower the pH. Silver carbonate is a
salt and should have little or no effect other than buffering (and
buffering will always tend to move the pH from any present acids or
bases toward the neutral pH of 7).
Marshall
Kathryn Clayton wrote:
On the subject of pH- how does the silver carbonate affect the pH? does it raise it or lower it?
On Aug 31, 2010, at 9:17 AM, Marshall Dudley wrote:
David AuBuchon wrote:
I'm also curious about the number 26PPM (silver oxide and silverhydroxide).
Frank Key says 13.3 is the saturation point of ions:
"What is the highest concentration of ionic silver that pure water will keep in solution? If no other
contamination anions <http://www.silver-colloids.com/Papers/definitions.html#anion> are present, the
maximum concentration <http://www.silver-colloids.com/Papers/definitions.html#concentration> of silver ions
<http://www.silver-colloids.com/Papers/definitions.html#silver.ion> that pure water can hold at room
temperature in an unsaturated solution <http://www.silver-colloids.com/Papers/definitions.html#saturated>
is 13.3 ppm. In practice, there is substantial dissolved CO_*2* in the water which provides additional anions,
so a higher concentration of silver ions is possible without saturation. "
He apparently looked up the solubility of silver oxide. However since silver
oxide will convert into and from silver hydroxide, which has a higher
solubility, the effective solubility when both are taken into account turns out
to be approximately double that. With CO2 in the water that allows for
formation of silver carbonate, which does have a higher solubility as well.
Significant presence of CO2 can be dtected by taking the pH though.
Marshall
~David A. (the "A" is to differentiate between several David's on the list =P)
On Mon, Aug 30, 2010 at 8:35 PM, Alchemysa <da...@alchemysa.com.au
<mailto:da...@alchemysa.com.au>> wrote:
We know the maximum ppm of IONIC silver in pure water is about 26
ppm. And we know 'true' colloidal silvers (e.g. Mesosilver) have a
PARTICULATE ppm up to 32 ppm. But whats the maximum TOTAL ppm that
can be achieved with some level of stability in pure water? Would
it be the sum of these two, or is it a case of 'one or the other'?
I guess I'm raising the question of 'saturation points' and
'suspension points' (if there is such a thing), and how they
interact. And I'm thinking of a batch thats made purely by
electolysis.
One problem in answering this question myself is that I rely on
silver-colloids.com <http://silver-colloids.com>. for various
details. But silver-colloids uses commercially purchased or
privately submitted batches for testing, and these batches tend to
be clear or pale yellow, and hence only about 15ppm TOTAL . No-one
ever submits a really dirty batch for testing do they?
David
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