Ivan wrote:
> I am a bit confused. > > I do not see why anions are required at all for silver ions to go into > solution. The ions will be solvated, surrounded by water molecules. If > there are no anions, there will be nothing for the silver to complex > with and so the saturation point will depend upon the interaction > between the ions themselves. > > There is 10^-7mol/L OH- ions in water at pH 7, which will allow Ag+ ions > to reach a concentration of 0.15mol/L which is about 16.2g/L or 16.2ppt, > given that the solubility constant of AgOH is 1.5 x 10^-8 > > The solubility constant of Ag2Co3 is 6.2 x 10^-12 which gives a > concentration of 2.32 x 10^-4 mol/L of Ag+ which is about 25mg/L. > In any event CO2 will dissolve in water to a concentration of about > 10^-5M and result in a pH of 6.3 . However the CO2 exists primarily as a > hydrated species, of which about 0.1% reacts to form H2CO3. This gives > us about 10^-8M of CO3, which gives about 2.4 x 10^-2M of Ag+ (2.5g/L). > > So it is not the concentration of the anions which limit the solubility > of silver at far greater than normal CS levels. How do you explain the > 13.3ppm limit? It it true, you are confused, but more than a little bit. Your chemistry calculations and theory are erroneous. To properly address all of the errors above, requires a detailed explanation which will take time to write it up. I expect we can have it ready in a day or so. To address the issues raised, we need to be able to write subscripts and superscripts, so the document will be prepared using MSWord and printed to a pdf file. I am not sure if the mailing list wants pdf attachements sent along, so it may be best to put the pdf file on the web site where it can be downloaded by those interested. I will advise the list when the document is ready. frank key -- 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]>
