[meteorite-list] nitric acid disposal

From: David Freeman <dfreeman_at_meteoritecentral.com>
Date: Thu Apr 22 10:28:31 2004
Message-ID: <3F91AD5F.7050001_at_fascination.com>

Dear Robert, List;
At the risk of being risky, I do add Acid to Water...and have for about
10 years while preserving water samples for state regulated testing as
per...EPA guidelines....mmm.....!
More so than which order, is to remember to wear glasses, be in a
ventilated area and wear rubber gloves and apron. The acid spillage in
the wrong place is a much larger concern to me than the order of the
acid and water. Be Safe.
Dave (one eye) Freeman ;-)

Robert Woolard wrote:

>--- "E.J" <jonee_at_epix.net> wrote:
>
>>IF I remember the admonitions of my chemistry
>>teacher correctly..NEVER
>>add Acid to the water but add water to the acid.
>>Should there be a
>>boil up you'll get wet and not disolved.
>>
>
> Elton
>
>
> Hello Elton and list,
>
> I think it's the other way around, isn't it??
>
> Perhaps this explains why:
>
>Never add water to acid, the heat of hydration could
>boil the water/acid mixture as the first drops of
>water mix with the acid.
>
>When you add acid to water, it takes a lot of heat to
>boil the large volume of water that you are hopefully
>using.
>
>Or, using this memory aid:
>
> Lab Safety - Remembering that you add Acid to Water
>not Water to Acid
>
>
>
>AW can be a short form for "Acid to Water"; WA can be
>a short form for "Water to Acid". When verbalized, AW
>sounds pleasant and good. "Ahhhh!". WA sounds menacing
>and bad, "WAAAAAHHHHHH!. If you can introduce this
>laboratory safety rule to your students with lots of
>enthusiasm, most will remember the rule because of
>your antics.
>
>
>
>I hope this helps...
>
> (But it's been a LONG time since high school
>chemistry! ;-)
>
> Sincerely,
>
> Robert Woolard
>
>
>
>
>
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Received on Sat 18 Oct 2003 05:15:11 PM PDT