----- Original Message ----- From: <[email protected]>
> Ivan: You said in part: >============ > "When I deliberately made a colloid that had a lot of sludge inclusion > and was a deep gold colour, the introduction of H2O2 caused an immediate > reaction in the form of many extremely small bubbles (made the sample > look cloudy) and the colloid became clear. The ionic content was > significantly higher after this reaction than before, as measured by Ion > Selective Electrode. > > There was no such reaction with a light golden colloid which I know to > be composed of a high proportion of ionic clusters (ISE ionic reading = > AA total silver reading) and the concentration remained the essetially > the same (slight increase)" >======================= > If you found "no such reaction with a light golden colloid which I know to be > composed of a high proportion of ionic clusters ...", is it reasonable to > conclude that the permanently clear HVAC CS has smaller particles then that > of the "light golden colloid" (consensus view: clear sols have smaller > particles on average than colored sols), Agreed. >BUT if bubbles of escaping oxygen > are generated (from Fred's H2O2 test) then at least SOME of these particles > are NOT ionic (using your definition of 'ionic')? Yes. And it is likely that those particles that may consist of both ions and atoms are broken apart and the atoms oxidised into ions. > Thanks for all your effort in trying to clear up our understanding of > colloids (question: can colloids ever be really clear?) In theory yes, but what is the definition of clear, no turbidity? as measured by a meter or by eye? Colloidal sols like CS fall into that region between colloids and solutions, at about 1nm colloids transmit visible light as witnessed by no Tyndall effect. Glad to help. > Roger Ivan. -- 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]>
