Elton
Robert Woolard wrote:
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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