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orthocresol
orthocresol
11:03 AM
@Mithoron Well, this one is a little silly as it hardly says anything much.
SO in particular gets a lot of criticism, it's likely because they are a very large site
But sometimes there is valid criticism and sometimes there are things that we as a small site can pick up on.
One of the best ways to drive this place into oblivion is to cover our ears and insist that the problem is "just with these people", and sometimes I get the feeling that SE tends to do that - perhaps to their detriment, I don't know
 
 
3 hours later…
pentavalentcarbon
pentavalentcarbon
1:37 PM
ehehe I always love it when "plzz" actually appears in a question
 
Buttonwood
Buttonwood
1:48 PM
@PrittBalagopal Regarding your answer here chemistry.stackexchange.com/questions/75285/…
Do you know if benzoic acid and its sodium salt equally yield a buffer like acetic acid and its sodium salt?
I was just in the course of minor retouches on the question (mhchem, pu); maintaining as much from the original, when you provided an answer.
And while you posted the answer (which already was accepted), I found this difference of $\ce{C6H5COOO}$ in the question, and sodium acetate in Henderson equation used in the answer.
$\ce{C6H5COOH}, of course.
 
Pritt Balagopal
Pritt Balagopal
2:07 PM
@Buttonwood omg I did not see that. It was always a problem with me, assuming benzoic acid to be acetic acid, by ignoring that 6. I'll fix it. And wait, whats that \pu for? What's wrong with \text?
And \pu doesn't render on the Android app.
 
Buttonwood
Buttonwood
3:00 PM
@PrittBalagopal For the acetate / benzoate question, I was simply surprised that benzoic acid and its salts may be used as a buffer, too.
So far, benzoic acid was (for me) a synonym for calibration of a calorimeter.
And sometimes, outside the lab, on some labels of juice.
Meanwhile, I learned that there is indeed something like a sodium benzoate buffer.
References for this may be googles book-preview here: books.google.ca/…
in Methods in Cell Wall Cytochemistry, by K V Krishnamurthy.
(There is no experience [yet] with cyctochemisrtry on my side.)
So the question may be much more relevant, than I thought on "first view".
It is backed by answers like
, too.
--
Regarding the formatting \verb|\pu{}|
or \pu{}
after stumbling over it
I find it very handy inside the mathematical mode enclosed by $$. It will keep the units upright and maintain a non-breakable space between figure and unit.
For me, this is an advantage over writing each time \text{} if I need a "kg" upright .
A bit like \usepackage{siunitx} in pdfLaTeX.
I did not know, however, that an expression like $m = \pu{12 kg}$ were not displayed (at all / correctly) via an android OS, nor that I would be able to check it by now.
This is all from my perspective.
Cheers.
 
orthocresol
orthocresol
3:25 PM
@Tyberius: Phlogiston (not phologiston) is, as I said above in my answer, a historical alternative. Phlogiston theory is one of the most fascinating, really strong and deep theories that ever existed. MO-Theory is a sad thing in comparison. But HOMO/LUMO in combination with hard/soft acids may be quite a nice thing. Fleming says (in Grenzorbitale (1976, 3rd chapter, 3.1.1, German Edition, I translate): “But an explanation is provided by MO-Theory.” I myself think that the real explanation is located in acid-base-salt theory. But Fleming denies this, of course, because of the taboo ch = f (ph). — Zeus 13 hours ago
 
Pritt Balagopal
Pritt Balagopal
@Buttonwood Any weak acid and it's salt can be used as a buffer, so I don't see any reason not to consider Benzoic acid as one.
And by the way, thanks for telling me what \pu is.
 
orthocresol
orthocresol
@PrittBalagopal at ordinary temperatures benzoic acid is poorly soluble in water, so even if you had benzoic acid + sodium benzoate, it would be a lousy buffer
 
Pritt Balagopal
Pritt Balagopal
Oh, I see.
 
orthocresol
orthocresol
I don't know the context though, I didn't open the question
 
Secret
Secret
Hey guys, I am trying to do a relaxed scan about a torsion angle of a piano stool complex. However since the Cp-Ru bond is only defined in computer by specifying a dummy atom for the centroid of the Cp and dummy atoms cannot be used with modredundant, how can I wrote a relaxed scan of this in gaussian 09 or 16, or is there really no way to do it and I have to settle with a rigid scan?
 
Pritt Balagopal
Pritt Balagopal
3:37 PM
The question does consider Benzoic acid in aqueous medium, strange. Or perhaps it was just for problems' sake.
 
orthocresol
orthocresol
@PrittBalagopal Yes, that sounds likely.
 

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