A single "dissolved" atom of Ag is still a metal. It does not stop being, by definition, a "metal" when it is a single atom in water.
A clump of silver, regardless of size, or charge, is still not "dissolved". It is by definition, a colloid. James Osbourne Holmes [email protected] FTNWO -----Original Message----- From: Fred [SMTP:[email protected]] Sent: Friday, June 16, 2000 8:55 AM To: [email protected] Subject: CS>H2O2 Test At 12:29 AM 6/16/2000, you wrote: >Hi Fred; > >What is the basis for your belief that the H2O2 test has any validity? > >Are metal particles of the submicroscopic size a determent? > >As I recall Ivan was the one that came up with this test. > >"Ole Bob" Ivan had suggested using H2O2 to reduce the size of silver "clumps" as a purifying effect of poor product and the discussion of silver being a catalyst sparked an idea in my mind, as we were at the time looking for a simple home test. Give the whole list credit if you wish! I later suggested the "baggy" test, after determining it was qualitative, not quantitative and easily upset by dirty glassware! I expect the time of formation rate and density of bubbles/sq. in. are good indicators of particle size! You can note on a dime that it is a very slow process vs. the rapidity with silver "sludge" - clearly a surface area dependency! Finer particles = faster bubble formation and with more particles there will be more bubble sites/sq. in.! It is quite clear to me, that if no bubbles are formed with an ionic form of Cs (I employ all measures to avoid the formation of crystals) yet they are formed with a obviously poor running setup where a dense cloud is allowed to form and stringers start (an indication of growth of crystals) then it is a valid test to detect elemental silver. I would expect in the HVAC arc sintering process that atoms or larger particles are formed and thus the high bubble rate I found! As further verification, of the effect, you can take "ionic" Cs and let it evaporate on a glass surface, leaving a brown residue. I believe from chemistry that what is left must be of the metallic form, not ionic, a deposit of fine crystals. It foams rapidly when H2O2 is placed on it, indicating a high surface to mass area! On the other hand, a "plated" area on the processing jug (clearly elemental) foams slowly - being a low surface to mass! Incidentially, I do not recall Ivans specific wording now, but I believe it may have been mis-interpeted by Trem, when he recently suggested using H2O2 as a "solvent" to clean plated areas off glassware! There is no doubt in my mind that it can breakup what I like to refer to as snowflake type silver crystals into smaller crystals, just as you can with frost, there being a very weak inter-crystal bond! It is surely just a mechanical rupture of a bond, not a solvating type effect, but there is only a catalytic reaction to well formed crystal. [email protected] -- 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]>
