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Re: HCl problems
> From: IDMiamiBob at aol_com
> Subject: Re: Aquatic Plants Digest V3 #646
big snip - I'll do some calculations on that when I get time.
> Also worthy of note: I was using up the 2% solution to reduce buffering in a
> bucket of water shortly after I finished my test. I overtightened the cap and
> cracked it. About a week later I noticed this crack, and tested the solution
> to see if it was still good. Guess what? pH had risen from 1.7 to 6.8.
Something is _far_ wrong here. The pH of 2% HCl should be well
below 1.7. I would expect about 0.26. A pH of 1.7 would suggest an HCl
concentration of about 0.07%. You would throw a lot of that into a solution
to reduce KH.
This is getting repetetive, but you _can_ forget gassing off of
HCl from dilute solutions. _Something_ else is happening!
Paul Sears Ottawa, Canada