[Q] colour of Cr(II) in water
L. Koene
Justin M Hettick
JMH
"L. Koene" wrote:
--
*******************************************
Justin M. Hettick
Graduate Student of Analytical Chemistry
*******************************************
Justin M Hettick
post as Cu(II). Forgive me.
JMH
Justin M Hettick wrote:
Laboratory for Biological Mass Spectrometry
Texas A&M University
Department of Chemistry
College Station, TX, USA 77843
Lab: (409) 845 0613
Home: (409) 775 6234
*******************************************
Uncle Al
>
> What is the colour of Cr(II) in aquous solution?
Cr(II)(aq) is a magnificent intense cerulean blue.
--
Uncle Al Schwartz
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SNUMBER6
>What is the colour of Cr(II) in aquous solution?
>
>Bart
>--
A beautiful blue color ... bringing back memories on research from 30 years ago
... interesting chemistry also ... Cr 2+ is very labile having a rapid water
exchange rate while Cr 3+ is kinetically substitution stable ...Cr2+ is very
air sensitive and when oxidized in air gives some polymeric species which is as
ugly a green as Cr2+ is a beautiful blue ...
In the Village ....
I am not a number ... I am a free man !!!!
L. Koene
<het...@mail.chem.tamu.edu> wrote:
> I must learn to engage brain before mouth. I misread (and typed) the
> post as Cu(II). Forgive me.
Yes, but Justin...
...your answer was not even false, according to the answer
from SNUMBER6. *big grin*
-- My question now is how the colour of Cr(II) looks like
compared to that of Cu(II)?
> Justin M Hettick wrote:
>
> > Cr(II) in aqEuous solution is Blue. Very Blue.
> >
> > JMH
> >
> > "L. Koene" wrote:
> >
> > > What is the colour of Cr(II) in aquous solution?
Regards,
SNUMBER6
>-- My question now is how the colour of Cr(II) looks like
>compared to that of Cu(II)?
Similar except that the Cu(II) blue seems to be not as "true" ... Thirty years
ago Cr2+ ... now with a company producing Cupric Salts ... gee i feel relevant
here ...
Cr2+ is easily made with Zinc amalgam in the bottom of a vessel containing
Chromium Perchlorate ... seal air tight and keep a Nitrogen or Argon atmosphere
bubbling through it ... in an hour or two you will see the color ...
The Drake
don't have more of those in the industry! (Oops, did I say that out loud)
Matt Miller
Uncle Al <uncl...@earthlink.net> wrote in message
news:36AC99...@earthlink.net...
>L. Koene wrote:
>>
>> What is the colour of Cr(II) in aquous solution?
>
egg_nu...@hotmail.com
> >-- My question now is how the colour of Cr(II) looks like
> >compared to that of Cu(II)?
>
> Similar except that the Cu(II) blue seems to be not as "true" ... Thirty
years
> ago Cr2+ ... now with a company producing Cupric Salts ... gee i feel
relevant
> here ...
> Cr2+ is easily made with Zinc amalgam in the bottom of a vessel containing
> Chromium Perchlorate ... seal air tight and keep a Nitrogen or Argon
atmosphere
> bubbling through it ... in an hour or two you will see the color ...
Add some Cr(III)Cl3 to a zinc amalgam under N2 with stirring and you should
get the sky blue Cr(II) quicker - within 15 mins. The colour change is from
dark green so it's unmistakable. Deoxygenating the water helps (by passin N2
thru) - when I wasn't doing this, the reduction failed more often, although
O2 in the water may not have been the problem.
I think Cr(II) is just as nice looking as Cu(II). It's certainly more
satisfying since it's slightly harder to get.
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Justin M Hettick
You know, at first I realized that I had misread the post as referring
to Cu(II). I quickly issued a retraction on my statement. I couldn't think
of the color of Cr(II) off the top of my head, so I went and looked it up.
Needless to say, I felt really stupid.
Regards,
JMH
"L. Koene" wrote:
> In article <36AC970E...@mail.chem.tamu.edu>, Justin M Hettick
> <het...@mail.chem.tamu.edu> wrote:
>
> > I must learn to engage brain before mouth. I misread (and typed) the
> > post as Cu(II). Forgive me.
>
> Yes, but Justin...
>
> ...your answer was not even false, according to the answer
> from SNUMBER6. *big grin*
>
> -- My question now is how the colour of Cr(II) looks like
> compared to that of Cu(II)?
>
> > Justin M Hettick wrote:
> >
> > > Cr(II) in aqEuous solution is Blue. Very Blue.
> > >
> > > JMH
> > >
> > > "L. Koene" wrote:
> > >
> > > > What is the colour of Cr(II) in aquous solution?
>
> Regards,
>
> Bart
> --
> http://huizen.dds.nl/~lkoene/
--
Uncle Al
>
> Wow! Cerulean! What a word! A chemist with a vocabulary... too bad they
> don't have more of those in the industry! (Oops, did I say that out loud)
Clearly a man who has never surfed Uncle Al - but a potential convert!
Uncle Al
>
> > >-- My question now is how the colour of Cr(II) looks like
> > >compared to that of Cu(II)?
> >
> years
> > ago Cr2+ ... now with a company producing Cupric Salts ... gee i feel
> relevant
> > here ...
> > Cr2+ is easily made with Zinc amalgam in the bottom of a vessel containing
> > Chromium Perchlorate ... seal air tight and keep a Nitrogen or Argon
> atmosphere
> > bubbling through it ... in an hour or two you will see the color ...
>
> Add some Cr(III)Cl3 to a zinc amalgam under N2 with stirring and you should
> get the sky blue Cr(II) quicker - within 15 mins. The colour change is from
> dark green so it's unmistakable. Deoxygenating the water helps (by passin N2
> thru) - when I wasn't doing this, the reduction failed more often, although
> O2 in the water may not have been the problem.
>
> I think Cr(II) is just as nice looking as Cu(II). It's certainly more
> satisfying since it's slightly harder to get.
If you want both pretty and easy, then it's vanadyl sulfate every time!
Mark Nighman
makes any difference. Just how many people are you intending to piss on?
Sorry - I don't have the vocabulary to express myself....
Mark A. Nighman
The Drake wrote:
> Wow! Cerulean! What a word! A chemist with a vocabulary... too bad they
> don't have more of those in the industry! (Oops, did I say that out loud)
>
> Matt Miller
>
> Uncle Al <uncl...@earthlink.net> wrote in message
> news:36AC99...@earthlink.net...
> >L. Koene wrote:
> >>
> >> What is the colour of Cr(II) in aquous solution?
> >
> >Cr(II)(aq) is a magnificent intense cerulean blue.
> >
L. Koene
...'superior background' ... 'piss on'
In the Netherlands we have an expression for people that are insulted
very easily:
"Long toes."
-- I suggest you to add it to your vocabulary.
Bart
On Thu, 28 Jan 1999 23:45:50 -0500, Mark Nighman <mnig...@sprintmail.com>
wrote:
Mark Nighman
insulted. It just gets old reading the put-downs, stereotypes, and the like.
You've got my curiosity: what does "long toes" mean?
Mark A. Nighman
Timothy Rothwell
On Sat, 30 Jan 1999, Mark Nighman wrote:
> You're correct in making a comment, but somewhat mistaken on my being easily
> insulted. It just gets old reading the put-downs, stereotypes, and the like.
>
> You've got my curiosity: what does "long toes" mean?
>
> Mark A. Nighman
>
Assorted stuff snipped
Long toes are easily stepped on?
-Timo