You can ignore the assumption of equilibrium for a while. That is, while highly concentrated CO2 is bubbling up in the water the water will attempt to reach equilibrium with the bubbles. Since CO2 is heavier than air, it will also tend to accumulate over the surface of the water if the air is still. Once the bubbling stops, if the container is left open, then it should lose absorbed CO2 until it reaches equilibrium with the air.
An easy way to determine if CO2 or another gas is involved is to simply place the sample in a vacuum chamber for a minute and pull all the gases out. The same can be done by heating, but heating could cause other chemical changes. Marshall rogalt...@aol.com wrote: > In a message dated 00-04-26 10:09:39 EDT, you write: > > << I would expect a low ph using arcing and carbon electrodes. Cabon plus > oxygen > gives carbon dioxide, which easily dissolves in water and produces carbonic > acid. > > Marshall >> > Marshall: I wrote the following to Ivan earlier. Perhaps you didn't see it. > > The pH measurments for my HVAC CS sample were obtained from 3 separate and > independent sources. In addition, I checked the "silver-list archives" and > found that the HVAC CS acidic pH phenomenon has been talked about repeatedly. > As far as CO2 is concerned, there is NO WAY that the presence of carbonic > acid could account for the low pH. For example, the CO2 typically dissolved > in rainwater could be said to be in equilibrium with the ~380 ppm of CO2 in > air. If you calculate the pH from this assumption you would arrive at a pH of > 5.6 - 5.7. Of course, you could ignore the assumption of equilibrium, in > which case the pH would be even higher. > > 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: > silver-list-requ...@eskimo.com -or- silver-digest-requ...@eskimo.com > with the word subscribe or unsubscribe in the SUBJECT line. > > To post, address your message to: silver-list@eskimo.com > Silver-list archive: http://escribe.com/health/thesilverlist/index.html > List maintainer: Mike Devour <mdev...@id.net>
