Natural Science Forum / Chemistry / General Chemistry / January 2006

I'm a journalist researching a story about how increasing concerns
about liability, national security, meth labs and so forth are making
it tougher on amateur chemists who are unaffiliated with major
institutions to obtain the materials (basic chemicals, labware) they

is it feasible to have "lle of water-ethanol-ethylpropionate system"

Is it correct to define whey protein hydrolization as a process which
breaks the protien down into separated amino acids and peptides?
(: warning ... chem newbie :)

I came across a related problem (of academic interest) in Galen Ewing's
book on Instrumental Analysis.
"The absorption spectrum of a fluorescent substance determined with a
coventional spectrophotometer is likely to be in error because of

Hi every one
In Michaelis-Menton kinetics for enzyme, it is assumed that [S]total

If the substrate concentration is very high than the enzyme

Dear
I have powders which is mixtures of CaO, CaTiO3, CaCO3..
Then I'm not sure the percentage of CaO in the powder.
Is there any easy way to find that?

Anyone know what this is? Can't be C3H6 can it?

Does anyone have an clue of the chemical identity of the ink used in
common yellow highlighters?  An aqueous extract of this ink brightly
glows green in sunlight and has a sharp absorption peak of 450 nm
(solvent water) in the 300 to 800 nm range.

I'm trying to make calcium ethoxide, Ca(OC2H5) using alkoxide process.
At this moment, I have Calcium granules not powder forms.
Can I get calcium ethoxide by mixing Calcium granules with dehydrated
ethanol in the Nitrogen?

Practical question: After working out a step-by-step synthesis for an
organic compound on paper, what is the best way to decide if the
synthesis is any good - that is, without testing it out in the lab?
Regards.

Hi, I'm kind of an amateur chemist. Anyway, I'd like to buy ampoules
with NaOH, that I can dilute with water when I need to and make 0.1 or
0.01N solution. I looked in different places but with no luck. Can
anybody tell me where to find this kind of stuff? Thanks in advance.

The general selection rule in a molecule for an electronic transition
is /_\n = +/-1. However most of the diagrams shown for fluorescence and
phosphorescence phenomena show transitions So -> S2 and So -> S1. The
former has /_\n = +2. Does this rule break down for complex molecules?

In chemistry we are having exothermic reaction like burning chaircoal.
If you burn several thousands tons of carbon, considerable thermal
energy is evolved. What is happening with the atoms - are some of them
are disappeared or all of them are lighter, because E=mc**2 ? Any

Does anyone know if there are any other stable compounds containing
just carbon and oxygen, apart from carbon monoxide and carbon dioxide?

The CRC mentions thallium malonate-thallium formate; density = 4.9
g/cc.
I need a non toxic cheap -- 10 cents/lb -- heavy liquid.  Rho > 3 gm/cc
If that doesn't exist let's just go for cheap.