Oh Lordy Yet another anomoly. When reagent manufacturers can't agree... Could be a factor involved with "this" process vs just adding water to AgOH? That 13 PPM keeps on popping up. Could be, Marshall
Ode At 11:08 AM 1/24/2005 -0500, you wrote: > >I have found several sites that claim that silver hydroxide is insoluble. However >I also have found the following, the second one give in fact, the solubility of >silver hydroxide to 3 significant digits as 13.3 ppm. > >This link http://chemmovies.unl.edu/chemistry/smallscale/SS063c.html I believe >intends to say that silver chloride is less soluble than silver hydroxide. That >would mean it has a solubility greater than .89 ppm. See #4. However they did >mess it up and say that silver hydroxide is less soluble than silver hydroxide by >mistake. > >According to http://www.silver-colloids.com/Papers/Solubility_Products.PDF the >solubility of silver hydroxide is 13.3 ppm, which is what we often quote as the >stable limit for ionic silver on this list. I feel this support the notion that >the silver in EIS is predominately silver hydroxide. > >http://www.northland.cc.mn.us/Chemistry/solubility_products.htm lists silver >hydroxide as having a solubility (Ksp) of 2.0X10-8, compared with 1.6X10-10 for >silver chloride. That would make silver hydroxide soluble than silver chloride, >but the exact difference would depend on the stoichiometry of the precipitant. > >http://home.snu.edu/dept/chemistry/syllabi/ARCHIVES/CHEM1224/LABEXP~1/SILVE R~1.PDF >shows the solubility Ksp of silver hydroxide to be 2.0 X 10-8 and silver chloride >to be 1.8 X 10-10 which is close to what the above reference shows it. > > I feel these support the notion that the silver in EIS is predominately silver >hydroxide which has a low solubility, but one that is sufficient for typically >EIS. > >Marshall -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.7.2 - Release Date: 1/21/2005 No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.7.2 - Release Date: 1/21/2005 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.7.2 - Release Date: 1/21/2005 -- The Silver List is a moderated forum for discussing Colloidal Silver. Instructions for unsubscribing are posted at: http://silverlist.org To post, address your message to: [email protected] Silver List archive: http://escribe.com/health/thesilverlist/index.html Address Off-Topic messages to: [email protected] OT Archive: http://escribe.com/health/silverofftopiclist/index.html List maintainer: Mike Devour <[email protected]>
