absolutely, and you'd better have the right kind of "still" to collect
the vapors.  i believe that nitric acid can be distilled (evaportated?)
to a higher concentration, though you'll also want to clean your' fume
hood afterwards....  best not to heat or boil a solution without some
idea of what will come out. freezing can also be a problem, particularly
for those acids that release fumes.  in any case, it's better not to
hear most chemical solutions, or heat them only as much as is required.

Daniel Chia wrote:
>=20
> Not all acids can be boiled to concentrate it mainly due to fume
> concerns... HCl releases HCl fumes esp when its concentrated and its
---------

--=20
Philip Stortz--"In Germany they came first for the Communists, and I
didn't speak up because I wasn't a Communist.=20
Then they came for the Jews, and I didn't speak up because I wasn't a
Jew.=20
Then they came for the trade unionists, and I didn't speak up because I
wasn't a trade unionist.=20
Then they came for the Catholics, and I didn't speak up because I was a
Protestant.=20
Then they came for me, and by that time no one was left to speak up."
-- Martin Niem=F6ller, 1892-1984 (German Lutheran Pastor), on the Nazi
Holocaust, Congressional Record 14th October 1968 p31636.

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