In reply to R Stiffler's message of Thu, 16 Nov 2006 15:06:18 -0600: Hi, [snip] >Blank>>We were able to drop out some white powder precipitate one a single >occasion some time back. >>>We had forgotten to turn off the test unit over the lunch hour. Never >>>able to reproduce the event in our steel test tank. The municipal source >of our water supply could >>>have had been hypo-chlorinated that day... or some chemical agent >>>to reduce manganese.. or visa-verse. Using a plexiglas tank with aluminum >frame and municipal >>>chlorinated water would occasionally produce the precipitate and severely >oxidize the aluminum. > >R.C. > >I have not duplicated you setup, yet I have never seem Cl released as a >White precipitate?
If chlorine in the water oxidized the Al, you might get a white Al compound as precipitate (chlorides, oxides, hydroxides, aluminates, or a mixture). Regards, Robin van Spaandonk http://users.bigpond.net.au/rvanspaa/ Competition provides the motivation, Cooperation provides the means.
