Ivan wrote:

> There can only one anion formed at the cathode, given we only have water
> and silver, and that is OH-.

This statement seems to ignore dissolved CO2 in the water. Besides hydroxide,
the other anion formed is carbonate.

Without the CO2 present, pure water will become saturated with silver ions 
at 13.3 ppm at room temperature. To make higher ppm requires additional anions 
in the form of the carbonates.

frank key


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