Ivan and Others Interested in CS Electrochemistry: I'm still trying to understand which electrode reactions take precedence over others.
Potential Anodic Reactions (1) Ag -------> [Ag+] + 1e -0.80 volts (+ over voltage) (2) 4[OH-] ---------> O2(g) + 2H2O + 4e -0.40 volts (+ over voltage) Potential Cathodic Reactions (3) [2H+] + 2e ------------> H2(g) +0.83 (with over voltage) (4) [Ag+] + 1e ------------> Ag(s) +0.80 (+ over voltage) (5) 2H2O + O2(g) + 4e -------> 4[OH-] +0.40 (+ over voltage) All other reactions occur at higher voltages, so I believe they can be ignored. I would appreciate knowing what the actual voltages are of the above reactions since most over voltages have not been included. If reactions (3) and (5) occur at the cathode, can that explain why no net OH- is generated since any OH- produced would consume excess H+ based on the water constant? We know that a net quantity of Ag+ exists in water. So what is the corresponding anion towards the end of CS generation? 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: [email protected] -or- [email protected] with the word subscribe or unsubscribe in the SUBJECT line. To post, address your message to: [email protected] Silver-list archive: http://escribe.com/health/thesilverlist/index.html List maintainer: Mike Devour <[email protected]>
