calling all chemists

what exactly is the difference between NO3-N and just plain NO3. Ingrid


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wrote in message
...
what exactly is the difference between NO3-N and just plain NO3. Ingrid


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================================================== =======

I'm not sure what you mean. NO3 with a minus sign is the nitrate ion.
There is no such thing as NO3 (without the charge) in water.

Is'nt it representing the different cycles of ammonia.

Ammonia/Ammonium? = N
No2 = the second step in the Nitrogen cycle (Nitrite)
No3 = Last step....(Nitrate)

I think thats it but I have been known to misquote :-)
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**So long, and thanks for all the fish!**


wrote in message
...
what exactly is the difference between NO3-N and just plain NO3. Ingrid


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List Manager: Puregold Goldfish List
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www.drsolo.com
Solve the problem, dont waste energy finding who's to blame
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Unfortunately, I receive no money, gifts, discounts or other
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"Happy'Cam'per" wrote:

Ammonia/Ammonium? = N

Ammonia is NH3

The Ammonium ion is NH4+

Ammonium hydroxide is NH4+ OH-

Nitrogen gas is N2

Ammonia \Am*mo"ni*a\, n. [From sal ammoniac, which was first
obtaining near the temple of Jupiter Ammon, by burning
camel's dung. See {Ammoniac}.] (Chem.)
A gaseous compound of hydrogen and nitrogen, {NH3}, with a
pungent smell and taste: -- often called {volatile alkali},
and {spirits of hartshorn}.

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So N is then Nitrogen?
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**So long, and thanks for all the fish!**

"Stephen Henning" wrote in message
news
"Happy'Cam'per" wrote:

Ammonia/Ammonium? = N

Ammonia is NH3

The Ammonium ion is NH4+

Ammonium hydroxide is NH4+ OH-

Nitrogen gas is N2

Ammonia \Am*mo"ni*a\, n. [From sal ammoniac, which was first
obtaining near the temple of Jupiter Ammon, by burning
camel's dung. See {Ammoniac}.] (Chem.)
A gaseous compound of hydrogen and nitrogen, {NH3}, with a
pungent smell and taste: -- often called {volatile alkali},
and {spirits of hartshorn}.

--
Pardon my spam deterrent; send email to
Cheers, Steve Henning in Reading, PA USA
http://home.earthlink.net/~rhodyman

hey... I went all the way thru quantitative analysis and dissociation constants
(twice yet). what I need is Rod Farley or a real chemist... isnt somebody's husband
a chemist on this list? I done all the searches and have come up with the standard
"total nitrogen" thing, now I want it explained in more detail and WHY they use this
way of expressing it when they werent doing that 20 years ago when I took the damn
chem course. Ingrid



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
List Manager: Puregold Goldfish List
http://puregold.aquaria.net/
www.drsolo.com
Solve the problem, dont waste energy finding who's to blame
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Unfortunately, I receive no money, gifts, discounts or other
compensation for all the damn work I do, nor for any of the
endorsements or recommendations I make.

wrote:

a chemist on this list? I done all the searches and have come up with the
standard "total nitrogen" thing, now I want it explained in more detail
and WHY they use this way of expressing it when they werent doing that 20
years ago when I took the damn

Who's "they"? When I've seen NO3-N, I thought it was just an indicator of
the Nitrate - Nitrogen pathway, not a molecular notation.
--
derek

I'm a chemist. I agree with most of the comments in this thread.

Nitrogen, as found in the air is Nsub2. The "sub" indicates subscript.
Nsub2 has little biological activity, but certain bacteria and other
organisms can "fix" nitrogen from the air and incorporate it into
biochemicals.

Ammonia is NHsub3. When ammonia is dissolved in water it is sometimes
called ammonium hydroxide or NHsub4OH. Ammonium hydroxide is a weak base.
It partially breaks down, or disassociates into the ammonium ion NHsub4sup+
and hydroxyl ions OHsup-. The "sup" indicates superscript. In addition to
other toxicity problems associated with ammonia, it is basic and will raise
the pH, i.e. increase the alkalinity of the water.

Nitrous acid is HNOsub2. Nitrous acid is a strong acid, in water it
completely breaks down into Hsub3Osup+ (hydronium ions) plus NOsub2sup+
(nitrite ion). The nitrite ion oxidizes quickly in well-oxygenated water
to become NOsub3sup+ (nitrate).

Unfortunately, none of this explains "what exactly is the difference
between NO3-N and just plain NO3." The terminology is simply not clear.

Richard

P.S. - I don't have a husband, but I do have an excellent wife.



Derek Broughton wrote in
:

wrote:

a chemist on this list? I done all the searches and have come up
with the standard "total nitrogen" thing, now I want it explained in
more detail and WHY they use this way of expressing it when they
werent doing that 20 years ago when I took the damn

Who's "they"? When I've seen NO3-N, I thought it was just an
indicator of the Nitrate - Nitrogen pathway, not a molecular
notation.

"Derek Broughton" wrote in message
...
wrote:

a chemist on this list? I done all the searches and have come up with
the
standard "total nitrogen" thing, now I want it explained in more detail
and WHY they use this way of expressing it when they werent doing that
20
years ago when I took the damn

Who's "they"? When I've seen NO3-N, I thought it was just an indicator of
the Nitrate - Nitrogen pathway, not a molecular notation.
--
derek
================================================== ============
You're right, Derek. NO3-N is new to me

Hey gang,

I am not a chemist, but this is an Ag term.

If you would please, could some one forward this to Ingrid, since she has
had me blocked for years now, and we don't speak directly, but the term
NO3-N is a new way designating the relationship of the amounts of nitrogen
applied to fields and the resultant NO3 that remains after the crop has been
harvested. Ag people in numerous states in the heartland have been working
on this for years now, but it is a way of watching and calibrating the the
amounts of N fertilizer needed for the next crop to prevent the buildup of
nitrates and keep them out of the water table amd out of run off.. It is
measured in the 6 inch to one foot levels of the soil all the way to the 3
foot depth of the soil. Nitrates are still measured in ppm, and the N is
measure in pounds/acre. Charts are kept to show the coorelations and show
the amounts needed for a variety of crops.

HTH

Tom L.L.
---------------------------------------------------.
"Killinchy" wrote in message
news:3yyod.313864$%k.20244@pd7tw2no...

"Derek Broughton" wrote in message
...
wrote:

a chemist on this list? I done all the searches and have come up with
the
standard "total nitrogen" thing, now I want it explained in more detail
and WHY they use this way of expressing it when they werent doing that
20
years ago when I took the damn

Who's "they"? When I've seen NO3-N, I thought it was just an indicator
of
the Nitrate - Nitrogen pathway, not a molecular notation.
--
derek
================================================== ============
You're right, Derek. NO3-N is new to me