> If you do use the formic acid, just remember:
> "Do as you oughtta, add acid to water."
> and
> "Here lies a guy all pale and flaccid.  He added water to the acid."
> 
> By adding concentrated acid to water, you ensure that anything that 
> splashes
> up is mostly water.  If you add water to concentrated acid, then 
> splashes
> could be mostly acid.  Dilute the acid in a well ventilated room (or
> outside) and don't breath the fumes.
 
This is one good reason for adding acid to water, but not the only one!
Diluting strong acids generates a lot of heat, so adding a small amount
of acid to a large amount of water reduces the chances of the mixture
being heated to boiling!  (Saw a demonstration of adding water to acid
once-the solution got so hot so fast it exploded out of the top of the 
beaker.)  Adding a litle water to a big container of strong acid must be 
done very slowly, very carefully, and behind the glass of an enclosed
fume
hood (I've had to do it a couple of times)....

When you do your first dilution, use a container that can handle a little
heat.
Some plastics are ok, but others can't take much heat (like pop bottles,
for example).   If you notice that the solution only gets a little warm,
then your
choice of container for your second mixture can take that into account.

Monica Jones
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