Re: Opaque->Transparent Reaction for a Demonstration?

On Sep 7, 2:21 pm, Martin Brown <|||newspam...@xxxxxxxxxxxxxxxxxx>
wrote:
careysub wrote:
On Sep 2, 10:34 am, dlzc <dl...@xxxxxxx> wrote:
Dear careysub:

On Sep 2, 9:59 am, careysub <carey...@xxxxxxxxx> wrote:
...

But how about making a truly opaque
liquid become clear?
Consider that you can make gold thin enough you can pass light through
it.http://adsabs.harvard.edu/abs/1976ceht.confR....O

By "truly opaque" I take it you don't mean phenolphthalein which turns
from pink to clear when an acid is added?

If not, then this might not be interesting in your instruction...http://dwb.unl.edu/Teacher/NSF/C10/C10Links/chemistry.about.com/libra...

David A. Smith

I have always wanted to see the Belousov-Zhabotinsky reaction (since
reading about it Scientific American in the 1970s) and I will
definitely have to set that up at some point when she can appreciated
the subtleties of oscillating reactions (but mostly for my own
interest). Malonic acid is not readily available though, so I'll have
to order it from somewhere.

It isn't that uncommon either

Hmm... I appear to be at a stalemate.

I can't find a source for malonic (propanedioic) acid that I can
actually obtain it from!

The big science catalogs (Fisher, Sargent-Welch, Carolina, etc.) will
only sell chemicals to registered businesses and educational
institutions now it seems, and chemical sources that I can tap
(photographic chemical suppliers, the inestimable Elemental
Scientific) don't carry this particular chemical.

I even looked into synthesizing it - but it is rather complicated, and
requires sodium cyanide, which is also apparently unobtainable now.

The B-Z reaction is now a threat to national security?

Any recommendations on where I can get malonic acid?


.

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