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Date: Wed, 18 May 2011 07:41:35 -0700
Reply-To: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: Jim Tung <jimtung**At_Symbol_Here**GMAIL.COM>
Subject: Re: Piranha solution
In-Reply-To: <5B0B5ACDD36F9340940DAC5575821D870112D364**At_Symbol_Here**ENTWEXMB0000002.university.harvard.edu>
Might the violent reaction between the solution and the ferric chloride be
the result of forming Fenton's reagent?
http://en.wikipedia.org/wiki/Fenton's_reagent
On Tue, May 17, 2011 at 1:20 PM, Johnson, Amy Carr
wrote:
> I have been reading about how to make Piranha solution and I keep coming
> across this statement, =93Add the acid to the peroxide, although some
> authorities disagree=94 Why would authorities not agree that adding aci
d to
> water instead of water to acid is best?
>
>
>
> I have seen some say add acid to peroxide for initial solution, but *when
> refreshing*, add aliquots of hydrogen peroxide to Piranha mixture. Is
> that ok?
>
>
>
> We recently had an incident when Piranha came in contact with ferric
> chloride and instantly reacted
>
> violently Was this due to the metal, the fact that both are oxidizers,
> both, or something else?
>
>
>
> I have read that neoprene gloves should always be worn. True?
>
>
>
> What type of glass is appropriate for containment?
>
>
>
>
>
Might the violent reaction between the solution and the ferric chloride be
the result of forming Fenton's reagent?=A0
http://en.wikipedia.
org/wiki/Fenton's_reagent
On Tue, May 17, 2011 at 1:20 PM, Johnson, Am
y Carr
<amy
_johnson**At_Symbol_Here**harvard.edu> wrote:
I have been reading about how to make Piranha solution and I keep comin
g across this statement,=A0 =93Add the acid to the peroxide, although some
authorities disagree=94=A0=A0 Why would authorities not agree that adding a
cid to water instead of water to acid is best?
=A0
I have seen some say a
dd acid to peroxide for initial solution, but when refreshing, add a
liquots of hydrogen peroxide to Piranha mixture.=A0 Is that ok?
=A0
We recently had an incident when Piranha came
in contact with ferric chloride and instantly reacted
violently Was this due to the metal, the fact that both are oxidizer
s, both, or something else?
=A0
I have read that neopr
ene gloves should always be worn.=A0 True?
=A0
What type of glass is appropriate for containment?<
/p>
=A0
=A0
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