Marshall wrote:
Silver ions in a solution cannot exist without water, so when the water
is
evaporated the silver ions (cations) must combine with an available anion
to
form a compound. The predominant anions present in a silver colloid
solution (EIS) are hydroxide and carbonate.
Where does the carbon come from? Absorbed CO2?
Yes, from absorbed CO2.
The compounds thus formed are silver hydroxide and silver carbonate.
Silver hydroxide is unstable and reduces to silver oxide and hydrogen.
I agree.
The silver carbonate will reduce to silver oxide
and carbon dioxide.
Silver carbonate is a stable compound. It is available from Acros chemical
with 99% purity. Why would it decompose unless exposed to light?
We believe that:
During desiccation the water (H2O) and silver carbonate (Ag2CO3) would first
form silver oxide (Ag2O) and carbonic acid (H2CO3). The carbonic acid
reduces to water (H2O) and carbon dioxide (CO2) which is draw off leaving
the silver oxide (Ag2O).
We will do some further checking and will confirm this later.
Frank Key
Colloidal Science Lab.
www.colloidalsciencelab.com
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