Ivan: I've incorporated you response to my initial proposal that attempts to describe which electrochemical reactions occur on the anode and cathode.
Potential Anodic Reactions (1) Ag -------> [Ag+] + 1e -0.80 volts (+ over voltage) (WE AGREE) (2) 4[OH-] ---------> O2(g) + 2H2O + 4e -0.40 volts (+ over voltage) (ROGER) Potential Cathodic Reactions (3) 2H2O + 2e -----> H2(g) + 2[OH-] + 0.41 + 0.40 = 0.81 (WE AGREE) (4) [Ag+] + 1e ------------> Ag(s) +0.80 (+ over voltage) (WE AGREE) Ivan: Assuming that the over voltage for reaction (2) is such that its total voltage is near 0.8, and taking into account that OH- is produced by reaction (3) which will make it available as a reactant in reaction (2), why then would it not be a candidate to compete with reaction (1)? If a high over voltage is the reason why it cannot compete, how much is the over voltage? BTW, by incorporating reaction (2) as a competing anodic reaction, the resulting consumption of OH- could explain pH values below 7 for LVDC CS processes. Have you been able to find the over voltage for the anodic and cathodic silver reactions? Roger -- The silver-list is a moderated forum for discussion of colloidal silver. To join or quit silver-list or silver-digest send an e-mail message to: silver-list-requ...@eskimo.com -or- silver-digest-requ...@eskimo.com with the word subscribe or unsubscribe in the SUBJECT line. To post, address your message to: silver-list@eskimo.com Silver-list archive: http://escribe.com/health/thesilverlist/index.html List maintainer: Mike Devour <mdev...@eskimo.com>
