The Periodic Table

gannex

1:20 AM

@getafix I'm an undergrad and I just finished TAing a semester. With exams and everything it was insanely stressful!!

orthocresol

@gannex congrats on getting through it ;)

here, they only let postgrads supervise labs

Jan

I just returned from a stressful journey into the depths of TeX’s category codes D=

orthocresol

I'm sending out emails to a bunch of academics

Jan

Munich had a system where the undergrads would assist the postgrads — but a postgrad always had to be in the lab or it would be immediately evacuated xD

orthocresol

so, to get off doing labs, the students just have to kick the postgrads out

Jan

1:30 AM

Yeah but in that case they wouldn’t get their experiments done and fail the course.

:D D:

And once again I notice how unfunny I find the Simpsons o.o''

getafix

@gannex good job, mate! :)

Jan

-1

A: Is the Kekule structure of benzene completely wrong?

I think that you will be interested to read my works about three-electrone bond in chemistry (benzene).What think? Benzene on the basis of the three-electron bond: Structure of the benzene molecule on the basis of the three-electron bond. Bezverkhniy Volodymyr (viXra): http://vixra.org/autho...

The new Chuck?

Should we all buy his molecular model kit?

orthocresol

I'm not sure you can buy something that doesn't exist

never quite sure what to do with these posts..

pushes responsibility to Loong and Martin

Jan

1:42 AM

Of course you can! Half of Amazon is full of it!

They have pretty pictures but they request you pay outside of Amazon’s structures. And once you paid they say ‘Thanks for the money; we don’t need you!’.

orthocresol

I never knew that sort of thing happened :/

Jan

Neither did I until I read about it in the paper.

@orthocresol I think, you can leave them be until a flag requires action.

orthocresol

@Jan I flagged it :D

Jan

:D

orthocresol

Personally I'd say delete. But my stance on answer quality is usually harsher than most people.

If I was a dictator, I'd be purging answers to "maintain the quality of the website" as we speak.

:D

secretly plans coup d'etat

2

Jan

1:51 AM

Sometimes I would, too. But I might be much harsher on questions O:)

orthocresol

come, we can rule together

Jan

I heard sirens like you singing that sort of thing before D=

It did not turn out well!

gannex

@getafix thx! I'm pretty happy i made it through. A sorts of things went wrong but I managed to fix most of them. Tbqh though I'm starting to think my school should t rely on undergraduate to ta so much. I have people grading my reports that I've been in classes with now & it gets quite awkward

Melanie Shebel

2:39 AM

@pH13-YetanotherPhilipp Oh sorry, I meant to type something different for that question, I can't remember what it was. My apologies, I often have a lot of tabs opens, I must have gotten confused on that one. :S

Oh, I meant to bring up something different with that question, I see it now. I was going to ask this in chat and must have gotten side-tracked.

10

Q: Sp5 hybridization in cyclopropane?

I have never before heard/read about something as a $sp^5$ hybridization. Today, Henry Rzepa's blog post made me aware of the existance of such a bonding system. That made me search a little bit and I found an entry in a german chemistry forum, where this question was also asked ... they answered...

This question contains a lot of content presumably from another website, is there a way it could be cut down while still containing relevant information. Perhaps quote the important bits and provide a link for the rest. I'm only asking because the large proportion of content from another site with the amount of content in the actual question, could hurt the site, as a whole, in Google search. That was the issue I initially meant to raise with the question.

Oh, I see that the original content has been translated from German, so it's a non-issue. No harm, no foul.

CowperKettle

4:04 AM

> Ultrasonicate until fully dissolved. Treat with ultrasound until fully dissolved.

I wonder which is better.

Tristan Maxson

Fully dissolve using an ultrasonicator.

1,3-feeds

0

Q: Question & answer edits to improve searchability

I've been improving questions mainly to improve the site's placement in search engines OR to improve the likelihood that a question would be clicked (more traffic.) I've been doing: Cleanup for spelling and grammar Getting rid of all caps titles so they're easier to read Formatting them so the...

discussion

getafix

7:33 AM

@gannex yeah I can imagine. Even though my university doesn't officially let undergrads TA, I have helped out a professor in that capacity for General Chem class (huge class), so I can sort of relate to your experiences. I absolutely detest grading assignments although I tried to be leave helpful comments. Fortunately, everyone in that class was my junior so no awkward moments

Secret

7:47 AM

Anyone here knew what the phase diagram of completely vaporising ethanol from a ethanol water azeotrope look like?

gannex

8:01 AM

@Secret chemguide.co.uk/physical/phaseeqia/nonideal.html

@getafix for me, it was organic-2. It was only 14 students, but it still got kind of hectic sometimes. One reaction didn't work for any of the students and the supervisor was upset with me. I suspect the reactant had degraded though.

Secret

8:26 AM

@gannex I am trying the find the shape of the curve in the change in concentration of the ethanol mixture in the boiling flask when 95% ethanol is boiled (i.e. < 95.6%) thus getting an idea how the concentration is affected as the azeotrope is boiled off (will it be a straight line of decreasing concentration, or will it be curved somewhat?) leaving water behind

would it be something look like this?