The Periodic Table - 2015-11-12

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1:01 AM

How do I think about stoichiometry and studying reactions in aqueous solutions, basically the 3'rd and 4'th chapter of those intro chem books such as Brown/LeMay? The later chapters make perfect sense, but those chapters are an anomaly to me :\ I mean the later chapters are dumbed down quantum mechanics and statistical mechanics, but those chapters I cannot place or understand, especially why they put them in the beginning out of nowhere. Thoughts?

1:22 AM

@bolbteppa huh?

2 hours later…

Martin - マーチン

3:23 AM

@Jan don't really know how it came about... I always thought that crystal field theory and MO theory were developed into something we do now call ligand field theory, but I honestly did pay much attention to how the theories were derived. And my knowledge of VB is also quite limited.

Howdy

Ya know what I saw last week?

Light. In fact, no one has ever seen anything other than light.

Martin - マーチン

Sure about that? Did you even see anything?

6 hours later…

9:04 AM

@bolbteppa Sorry, come again?

I didn't understand either...

@Pies Not sure if great punniness or complete ignorance ô.o

1 hour later…

10:34 AM

@bolbteppa Wha? What does stoichiometry have to do with quantum mechanics?

@TanMath People in this chatroom aren't like that. Or at least they don't try to be.

@Mithoron retagging questions.

@TanMath Tags in chem.SE.

@Pies Common, you can do better than that. :P

@Ϻ.Λ.Ʀ. Wow …

@Ϻ.Λ.Ʀ. Just wow …

Pretty evil, huh?

2 hours later…

12:49 PM

All hail today's Monty Python reference:

1

A: How to decide between different possible substitution/elimination mechanisms under given conditions?

Generally, your substance can react in one of the following four ways that you have already identified: $\mathrm{S_N1}$ solvolysis on the tertiary chlorine resulting in 4-chloro-2-methylbutan-2-ol;[1] $\mathrm{S_N2}$ solvolysis on the primary chlorine resulting in 3-chloro-3-methylbutan-1-ol; $...

3 hours later…

3:59 PM

I think, I like the new "from review" feature

If you have a new question, please ask it by clicking the Ask Question button. Include a link to this question if it helps provide context. - From Review — Loong 1 min ago

2 hours later…

5:29 PM

Is there a MathJax shorthand for upright d which is not \mathrm{d}?

5:47 PM

@Jan something like \text{d}? or even shorter?

@Loong I was thinking more of something like \d similar to \sin but w/e I just went ahead and edited with \mathrm

@Jan for differentials and derivatives, such as $\frac{\mathrm df}{\mathrm dx}$?

@Loong Yes.

ah, ok. I usually use \mathrm d, i.e. without braces

6:09 PM

@Jan If I am not wrong, you can put \newcommand{\d}[0]{\mathrm{d}} in your first equation which lets you use \d

@orthocresol Waa~y too much work xD

@Jan If you save that line somewhere so that you can copy paste it, then it becomes easy :D meta.chemistry.stackexchange.com/questions/111/…

It's easier with real latex documents, I have a "template" that contains all these things in the preamble.

In particular \newcommand{\odiff}[2]{\frac{\mathrm{d} #1}{\mathrm{d} #2}} and
\newcommand{\pdiff}[3]{\left( \frac{\partial #1}{\partial #2} \right)_{#3}} save me a ton of work

@orthocresol Yeah, \newcommand is a strong tool in (Xe)(La)TeX, I'll definitely agree. Although I didn't make use of it to a quarter of its potential so far x3

@orthocresol newcommand can have side effects since it affects all the following posts on the page

6:42 PM

@Wild good kitty. Here, have some fish! *hands @Wild some tuna*

hello all!

where is @Ϻ.Λ.Ʀ. ?

hi @Jan @Loong @ortho

@TanMath hi

Hi @Tan o/

Finally some life in here xD

Three people talking within minutes, didn't have that for some time.

6:57 PM

=^.^=

@Jan thx for that! :D

@Loong hmm, that's true

@Jan, but why, why did you delete your comment before I replied? :D

@Jan will u be there for the TRE?

looks like @Ϻ.Λ.Ʀ. is sleeping...

SAY NO TO TRE! XD

@Wildcat why?

7:07 PM

@TanMath why not? :D

@Wildcat or why don't we have a TRE?

@TanMath don't we have it? :O

@Wildcat Because obsolete ;)

@Wildcat yes, but you don't want it!

@Jan yes, I agree, TRE is obsolete! XDDD

@TanMath it's boring. And useless. Have a free time, spent it properly! Follow us (cats) and just SLEEP! :D

7:11 PM

@Wildcat go to sleep cute cat!

@Wildcat Yeah, typical cat-reasoning.

Sleep when the others want to work (preferably exactly where they want to work) and play when the others want to sleep (preferably in the same room and very loud games involving jumping about).

:D

7:30 PM

I just learned I won't be there for the TRE tomorrow . . . :'O

@TanMath He can't possibly be sleeping while he has an exam tomorrow.

@Ϻ.Λ.Ʀ. :(

@Tan @Jan @Wild @Todd @Mart @Ortho @anyone else, just for tomorrow's TRE, polish any remaining tags from one-taggers.

2

8:00 PM

Now that cucumber question is the prototype of a maths question that has nothing to do with chemistry, isn't it?

Yes.

@Jan It's like the red wine/white wine mixing question.

teaching understanding for counter-intuitive results

@Loong Is that question present on Chemistry?

@Jan yes, here it is coffee and orange juice:

2

Q: Coffee and orange juice concentrations with a twist

This question dates back to a time where I used to watch something called The Curiosity Show... Kinda like Bill Nye the Science Guy's show. I just can't recall the answer to this so I'm hoping that someone could shed some light. I have two glasses of equal size and volume, with equivalent volume...

everyday-chemistry concentration

8:15 PM

@Loong I think, that should be tagged homework, too, rather than everyday-chemistry ^^

everyday-homework

todays-homework

I think I did my worst tagging here:

1

Q: Which phase is more efficient for temperature changes?

In the case of attempting to heat and cool down an object of different states, if you in some case managed to achieve the same temperature of a solid, liquid and gas what state would scientifically heat or cool the object faster? On my view point I suggested a gas to be more efficient simply du...

temperature surface-chemistry

Closes eyes Just go retag it.

hm, we have phase and heat

It's something-phys-chem, I'm out.

8:20 PM

@Jan Then go and answer Melanie's question before Ron does it. ;-)

@Loong Nah, I'm going to go home now. (Also, I don't know what mercury sulphate would do, so I'm keeping quiet before I experience a wrong-mechanism moment like ron recently had xD)

I found something in Carey Sundberg.

8:36 PM

It should probably be alkynes, not alkenes

Oh.. I didn't see Ben's comment

Should this be $$\mathrm{some\ terminal\ alkyne}\ \ce{->[\ce{H2O}][\ce{H2SO4,\ HgSO4}]}\ \mathrm{some\ ketone}$$ Alkenes undergo oxymercuriation to form alcohols. — Ben Norris 14 mins ago

pubs.acs.org/doi/abs/10.1021/ja01270a061

@Ϻ.Λ.Ʀ. Can I be the leader?

Or coleader?

8:56 PM

@Loong @orthocresol @Jan @ToddMinehardt @Mithoron @Martin-マーチン @anyone else I will be the leader when I come to the room... Since I won't be here from the very beginning, do you want to delay the TRE a little bit later (about half an hour later)?

The subsequent article on "The Explosion of Chloroform with Alkali Metals" sounds more interesting

:D

@orthocresol a Staudinger explosion, yeah :-D

So?

Well @ortho doesn't care.. Anybody else?

@TanMath do have a plan, what you want to do?

@TanMath I am fine with anything, although I cannot guarantee I will be here

9:03 PM

@Loong so far, acid-base tag, and maybe some of the remaining homework

.any ideas?

@TanMath ok. I guess, there will always be new homework.

I might do thermodynamics and related tags...

I'm new to chat (sorry), what is TRE?

9:18 PM

@MelanieShebel the great retagging event...

Ooh, how can I help. Just going through questions and finding better tags for them?

@MelanieShebel Welcome to chat! And meta.chemistry.stackexchange.com/questions/2940/…

Thank you!

`(.•.)´

Aww

9:22 PM

@MelanieShebel hi

@Loong hello!

@MelanieShebel Your question still reads "alkenes". Are you going to change that?

Oh my, I missed the million mentions of the word alkene in my question. Fixed! Thanks!

:-)

We found a paper about that: pubs.acs.org/doi/abs/10.1021/ja01270a061

But I can only read the first page here. :-(

@Loong do you want the pdf?

9:31 PM

@orthocresol You should ask Melanie. ;-)

I can get it. :)

2 hours later…

11:14 PM

@TanMath - i'll be there, sounds good

11:47 PM

@MelanieShebel Your question about Mpemba effect is rather bad :(

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Nov '1512

The Periodic Table

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