OK, I am totally buffaloed now. I have made two 5 gallon batches and added H2O2 to them. Everything is as close to identical between them as I can get, but the reactions were totally different.
Batches were produced as follows: Initial pH of water = 6.8 electrode area = 48 square inches each .999 silver plates current = 38 mA voltage ran typically 15-16 volts during making it continuous stirring, and polarity reversal at one minute per half cycle. Silver content estimate from conductivity measurements 20 ppm both were crystal clear, and measured 16.5 uS. both batches made at about 62 degrees F. tyndall was faint did not measure pH before adding H2O2 Added .5 teaspoon H2O2 per gallon, IE 2.5 teaspoons of 3% to 5 gallons to give 17 ppm First batch tyndall stayed faint, maybe even became fainter - conductivity measured 16 uS essentially unchanged Second batch tyndall became strong, EIS has a slightly cloudy look, but no color, conductivity 9.5 uS approximately halved. Both batches measure a pH of about 7.6 after adding H2O2. Adding H2O2 to distilled water gives a pH of 6.8 unchanged from plain DW. Taking samples of the second batch I did the following: Heated it, cloudiness and tyndall stayed the same, indicating that it was no silver chloride or silver oxide precipitant since the solution limit goes up when you heat it. Diluted it by 50%, tyndall approximately halved, indicating once again that the cloudiness is NOT a silver compound with limited solubility Added another 50 or so ppm of H2O2, no change. Added 500 or more ppm of H2O2 and it cleared up. I have no idea what that means. Added ammonia (ammonium hydroxide), tyndall did not change, proving that the cloudyness is from colloidal particles not from any molecular compounds of silver precipitated. Checked for color, none noted, meaning that the particle size is either very small, so the absorption is in the uv range, or very big so the absorption is in the infrared range. Strong tyndall implies large particles though. Will let sit for 24 hours and see if anything precipitates out, if we have large particles I expect to see it clear upon sitting. I am making another batch now. Before adding the H2O2 to the entire batch, I plan on adding it to a few ounce a drop at a time and try to figure out some more if the 3rd batch clouds up. Marshall -- 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] Address Off-Topic messages to: [email protected] The Silver List and Off Topic List archives are currently down... List maintainer: Mike Devour <[email protected]>
