reaction between phosphoric acid and acetic acid
Werner
this be dangerous ?
Werner
Uncle Al
>
> What happens when acetic acid and phosphoric acid are mixed ? Can
> this be dangerous ?
Both concentrated acids are dangerous. Glacial acetic acid dissolves
skin. What are the pKa values for the first ionization of phosphoric
acid and for protonation of acetic acid?
Is there an exotherm on mixing? That tells you something.
--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
"Quis custodiet ipsos custodes?" The Net!
Lab Rat
> Werner wrote:
> >
> > What happens when acetic acid and phosphoric acid are mixed ? Can
> > this be dangerous ?
>
> Both concentrated acids are dangerous. Glacial acetic acid dissolves
> skin. What are the pKa values for the first ionization of phosphoric
> acid and for protonation of acetic acid?
>
> Is there an exotherm on mixing? That tells you something.
As far as I know, mixtures of acetic, phosphoric and nitric acids are
used as aluminium etchants in chip manufacture, and as metal cleaning
agents. I've had mixtures of these acids sitting on the bench for
ages, and nothing happens. We were working on automated titration
methods for determining the individual compnents in these mixtures -
easy, as it turned out.
Heinz W. Wiggeshoff
>
> Both concentrated acids are dangerous. Glacial acetic acid dissolves
> skin.
During this heat wave, anything "glacial" sounds like something to
soak in or imbibe.
A year ago, I posted a request for an herbicide formulation here;
something to kill all vegetation in my gravel driveway, but without
the Monsanto markup. The two replies were salt and manual weeding.
Thursday I found a product which addresses my problem in a Home
Hardware store, (Ottawa, Canada), at $15 as opposed to the $20+
for Roundup et al.
The ingredients are (from memory, bottle is in garbage) strong
acetic acid and some kind of lemon extract. The pitch was that
this product is environmentally safe; BUT when mixing in the
ratio of one liter to 3 liters of water, wear gloves, eye and
overall skin protection.
I don't have a sprayer, so where I sprinkled or poured the bucket-
full of this product, the weeds dutifully died by Friday, even
though we had a bit of rain in Ottawa.
Just checked the driveway, and it appears I'll need another application
of weed killer. My question is: can one obtain this killer combo at
less than big bucks per liter, and can the mixture be enhanced to wipe
out all forms of plant life?
Buckleys
Why don't you just spray them with 2-stroke fuel?
Rob.
Uncle Al
Vegetable oil sprayed on foliage plus bright sunshine will kill it
off. Roundup kills it dead.
Mark Thorson
> Just checked the driveway, and it appears I'll need another application
> of weed killer. My question is: can one obtain this killer combo at
> less than big bucks per liter, and can the mixture be enhanced to wipe
> out all forms of plant life?
I don't know if it's still being sold, but Kodak used to sell
large bottles of glacial acetic acid for dilution to make the
stop bath for processing film and prints. A large photographic
supply store might carry this.