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" <[EMAIL PROTECTED]> 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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