The Periodic Table - 2016-10-02 (page 2 of 2)

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4:00 PM

@MAFIA36790 it means, you should say that it is unclear

user116211

@DHMO It is not unclear in its query.

pentavalentcarbon

@MAFIA36790 That is a chemistry question.

user116211

@pentavalentcarbon That is what I'm saying.

pentavalentcarbon

Right.

user116211

I'm voting to close this question as off-topic because it has nothing related to physics; Solid state reaction is not the same thing as solid state physics. — MAFIA36790 1 min ago

pentavalentcarbon

4:01 PM

It's not unclear or anything, it just isn't physics.

alright

i'm out of this

user116211

@pentavalentcarbon yes.

user116211

I've not referred to Chem as I'm not sure whether OP has done sufficient research efforts or not and I can't just vote to migrate such posts to Chem.SE.

We have a bunch of misunderstandings here. Downvotes are on the content we provide, not on us. Everyone gets downvotes. I do. You do. Ortho does. It's ideally because someone didn't deem the content we contributed as high quality. There are other reasons, one of which, and a really minor one, being spite. Sadly, sometimes people take downvotes way more seriously than they should. That said, we should be somehow discouraging you, from rashly asking. SE should be a last resort. You should always try Google, textbooks, and Q/A sites first. — Rubisco 8 mins ago

The second misunderstanding is that if a downvote is quick it must be rash. That's not true. You're just devaluing valuable feedback from someone who's been doing this a lot. When I see a badly formatted homework question and I vote it down 30 seconds of it being posted, I know what I'm doing perfectly. The third misunderstanding is that we downvote because you're lowly and we're chemistry Gods. That's just not true! I'm not even a chemist. That doesn't stop me from voicing my opinion on questions, and that doesn't mean I want to feel superior. I'm just rating content. — Rubisco 1 min ago

The final misunderstanding is that downvotes are misused. They're the most effective ways of helping moderate the site, and that's not what I assert, but what data has proven. Over and over and over. — Rubisco 12 secs ago

That's a lot of serious talk.....for an enzyme that is.......

2

4:15 PM

ᕙ(⇀‸↼‶)ᕗ

pentavalentcarbon

@AaronAbraham some enzymes operate so quickly they might as well talk

4

@Rubisco chuckle

Awww.....you don't have to make that face....

ʕ ⊃･ ◡ ･ ʔ⊃︵┻━┻

Wot?

user116211

Seriously speaking @Rubisco, such users are a lost cause; that post is just nothing but ranting as a response to the downvotes he/she received. Then he/she concocts some crappy theory of downvotes and all others being mean/bully and all that. Though those comments of yours are enlightening, I betcha that user won't deviate away from his/her crap.

4:19 PM

@MAFIA36790 If you were Noah humanity would've been extinct.

user116211

@Rubisco ._.

Firstly, no.

The fact that they've aired it without insulting someone means they're trying to communicate.

user116211

I've tried countless of times to change their minds; in return you get threat comments or no response and nothing.

Second, we should do what we should do. Guide, moderate, guide again, ice cream, guide, moderate, ice cream, guide . . .

If it takes a toll on you, take a break.

Go out there. See the world and how stupid it is.

Listen to Trump to sleep better.

pentavalentcarbon

!!unflip/MAFIA36790

@Rubisco don't go there

user116211

4:22 PM

._.

Come back fresh, when you're ready to take more.

That's how men stiffen, man.

pentavalentcarbon

stupid @Chemobot, work!

user116211

@pentavalentcarbon ;P

@Chemobot even my grandma doesn't sleep to this time of the day.

user116211

@pentavalentcarbon We have Trump fans in Physics; but won't disclose the name ;))

4:23 PM

Trumpfan99

pentavalentcarbon

@MAFIA36790 How you can believe in both is beyond my comprehension but that's why science is nice. It doesn't care whether or not you believe in it.

I'm starting to like the crazy boogieman.

You know, as a storyteller, not POTUS.

You intrigues the hell outta you to sell his bullshit

user116211

@pentavalentcarbon Believe what?

He also likes building walls, so that makes him against Wreck-it-Hillary

user116211

@Rubisco: I M THIRSTY OF GIFZZ!! SHOW ME SOME!!

user116211

4:25 PM

@Rubisco There would be longer ladders too ;)

pentavalentcarbon

@MAFIA36790 Trump and physics.

ok, I had to look at the chemobot code and I was doing it wrong. !!untable

┻o(Ｔ＿Ｔ )ミ( ；＿；)o┯

user116211

@pentavalentcarbon Well, they are more of mathematicians ;P

pentavalentcarbon

what the hell is that?

That's not an !!untable.

(ヘ･_･)ヘ┳━┳

4:26 PM

it is the hell

pentavalentcarbon

There!

@Chemobot you should learn to behave better while I eat lunch

user116211

@Rubisco Also, the main fun lies in the fact that the expenses would have to be carried on by the Govt. of the neighbouring country; not the Trump ~~regime~~ Govt. ;P

@MAFIA36790 America is the least entertaining and most irritating bully of all time.

They should learn a bit from Iran. We don't even know what has been left to oppose anymore.

Maybe we'd pick a fight with Martians.

user116211

@Rubisco sure ;P

Politics is so damn complicated. We end up shaking hands with Lord "Putin" Voldemort, from a country that's been sucking our blood for three hundred years.

user116211

4:32 PM

Second to Trump jokes, I love Putin memes ;)

@MAFIA36790 I'm still here watching you, my friend. ;)

:D

Putin is sexy.

Even for cats.

> nomination period begins

tomorrow

@Ortho watching you ಠ_ಠ

Speak of the devil

@Rubisco and we all are watching you. :D

@CowperKettle You can ping me if you have biochem questions.

@orthocresol Thank you! I definitely will (have questions and ping you)

4:35 PM

A free sulfhydryl group (that's a very biology term, a chemist would call it a thiol group), in this context, simply refers to -SH which is not oxidised to a disulfide.

"Oxidised"? There is no oxygen. It is still oxidation?

@CowperKettle Mmhmm. There are three ways to think about oxidation, each of them are helpful in different contexts.

Yes, I must have forgotten

1) Loss of electrons/gain in oxidation state. 2) Gain of oxygen. 3) Loss of hydrogen

Here, it is possible to see that sulfur is oxidised from -2 to -1, but loss of hydrogen makes it very obvious :)

But S in disulfide has the same valence as S in a thiol?

4:37 PM

RSH + RSH -> RS-SR

OS isn't the same as valence. The valence is unchanged, but OS increases here.

oxidation state

Ah, yes.

There were two hydrogens. Now there's only one S-S link. Hence the oxidation

For example, H2O2 has oxygen(-1), but H2O has oxygen(-2) even though the valency of oxygen is 2 in both cases.

Mmhmm!

And, regarding mixed disulfides: you can think of a mixed ether as R-O-R' where R $\neq$ R'

so a mixed disulfide is simply R-S-S-R' where R $\neq$ R'

I reinstalled my OS in the summer. Where is that add-on for Chrome (JavaScript for formulas)? (0:

13

Q: MathJax in chat (ChatJax offshoot)

This is an offshoot of ChatJax, which enables MathJax along with mhchem on chat. Copy the text below: javascript:(function(){if(window.MathJax===undefined){var%20script=document.createElement("script");script.type="text/javascript";script.src="https://d3eoax9i5htok0.cloudfront.net/mathjax/lat...

discussion mathjax chat

I'm not sure, actually mathjax isn't loading for me either right now for some weird reason

Oh well! $\neq$ is just the not equals to sign: =/=

Not loading for me too

4:43 PM

@Rubisco Heh, sorry, I just wanted to respond to that first.

@CowperKettle chrome.google.com/webstore/detail/se-chat-mathjax/…

Well..... Oh well..... I am sure other people will run, so there is no need for me!

Mathjax works for me. Cry like a little girl.

Or two little girls.

@Wildcat Thank you!

Yay

@orthocresol Stop standing on ceremony.

I wonder if Jan'll run.

4:45 PM

@orthocresol Yes, I understood that! (0: My hundreds of hours over Rudzitis proved at least marginally useful

Ok, see, if there is only one person running at the end of the nomination period, I will run

I'm starting to feel like Trump.

Then it'll be three good candidates for two places, and that means one of us will be unhappy, and I don't like that . . . so

I'll kick you in the balls so we'd only have two candidates.

I'll just withdraw my nomination.

My non-existent nomination.

1 min ago, by Rubisco

@orthocresol Stop standing on ceremony.

Really dude. It's like being nice to each other. Nice is weird.

@Ortho you should be publicizing Bill Rubisco's affairs, and I should make your tax records public.

We should jump on each other. Like monkeys.

Or one monkey and one seal.

Or one RuBisCO and one seal.

I'll build a wall to keep out the homework-askers

Imagine the homework questions, they're like a bag of Skittles

4:55 PM

user image

@orthocresol Sweet and colorful?

@CowperKettle They smell

LOL

@Rubisco LOL

@CowperKettle No, they're poisonous and if we eat too many of them, we will literally become Yahoo Answers.

4:56 PM

(0:

I propose we form an alliance with the Russians as well.

See, they're already in here in chat.

(0:

gosh

stop telling me "NH3 is a strong field ligand"!!!!!!!!!!!!

0

Q: Modeling a waterfall with waterdrops

First of all I'm a pure mathematician. I'm modeling a waterfall, the water stream in a rectangular box with a width of $\text{W}$, a length of $\text{L}$ and a hight of $\text{H}$, so the volume of the water that is streaming from a higher point to the lower point equals $\text{V}_\text{water}=\...

physical-chemistry water

Maybe I should just answer it myself already.

5:22 PM

Hm, in 2009, someone changed the structure of decalin on Wikipedia to a wrong numbering, and no one noticed it and reverted it until now.

5:36 PM

Guess things have changed in 30-years. Numbering decalin, as I did, the 1-double bond is on the ring junction, otherwise the diagram is correct. Don't have a drawing package; and, given the silly prices of Chemdraw (a monthly subscription) am not likely to acquire one. All I require is the comfort of knowing my assignments are correct--if they are. Cheers. — tony 11 mins ago

user image

So, this one?

@Loong Someone changed a Cowper's poem in a bad way several years ago on Wikisource, and I only discovered it when I read the printed out version.

Wiki projects depend on constant moderation

6:03 PM

Couldn't he just draw it out on paper

Seems like you got the correct structure, but "think this is S (OH> CH3> CH2 = CH2)" doesn't seem legitimate

6:19 PM

Yes, his actual stereochemistry problem may be related to the "When choices remain after evaluating the second sphere, the exploration procedure is continued in the same way further away from the stereogenic center." rule, and to the splitting of double bonds.

7:13 PM

Ok. I edited my meta rant. I think it sounds a bit less grumpy now.

7:29 PM

user image

Is that possible in one step ?

You'd probably get the ketone, not the geminal diol.

Acetal hydrolysis is usually done with aqueous acid, if I'm not wrong.

Well so imagine this one :

user image

My first example was not good ^^

Fairly sure aq H2SO4 would work for that

Just ether hydrolysis - whether it's one or two ethers probably doesn't matter much

OK thanks

Then again it's 3:30 and I need to sleep so take everything I say with a tablespoon of NaCl.

7:37 PM

No that's OK I will try I guess you're ok

8:17 PM

Breaking news everyone, I'm about to beat Ron in suggested edits.

@Rubisco Come back when you beat him in total score for answers in the organic-chemistry tag. ;-)

@Loong That's a winkier way of saying go away.

Much obliged.

2 hours later…

10:32 PM

These days a lot of questions are unclear what they're asking.

True so.

I'm listening to TMNT soundtrack.

'tis good

I’m not listening to one of Tarja’s latest albums. I wonder why.

Does strong acid make strong base or weak base? (sorry for stupid question)

A strong acid has a weak conjugate base.

10:42 PM

@DHMO What is pKa + pKb?

And how is a weak acid/base defined?

@ortho I used up all my votes today. Am I a good porphyrin?

@Rubisco 0?

alright, I get it.

Also, does 1M of monobasic strong acid really have a pH of 0 although it does not completely protonate?

11:04 PM

Yes it does. Measure the pH of 1 M HCl.

why?

wait, does HCl completely ionize or not?

It has a pKa value well below zero so go figure ;)

@Jan no. Try to edit-cap

@Rubisco Edit caps exist?

Let's find out after 50000 edits

@DHMO no

11:13 PM

@Jan so the pH is just close to 0?

@DHMO I meant pKa + pKb isn't 0

The Last Samurai has a really sad theme to it

@Rubisco 14 lol

@DHMO and what's a weak acid?

@Rubisco eh, pKa>0?

@DHMO so if they want to add up to 15, what would the pKb of the base be?

11:22 PM

@Rubisco >15

if HF can either lose or gain a proton... is it amphoteric?

@DHMO These are where the "conjugate acid/base of a strong/weak acid will be strong/weak." guidelines come from.

So stick to real math instead of vague sentences

@Rubisco I see, thanks

@DHMO many things can be both an acid and a base. You need to have what it takes.

@Rubisco I'm just asking if it is amphoteric.

Something to protonate HF should be a good acid.

11:26 PM

itself.

@DHMO you can call it that I guess. I haven't wrestled with this terminology for two years and I can't be sure of the details

Whatever you label it doesn't change what it really does, so stick to that

you know, 3 HF ⇌ H2F+ + FHF−

just like water

> hydronium is the strong acid in aqueous medium as acids stronger than hydronium is deprotonated

then what is the strongest base?

Hydroxide. Any base stronger than hydroxide pulls a proton off a water molecule.

i see, you see how stupid i am

is there an autoionization constant?

like water to hydronium and hydroxide

hydrofluoric acid to HFH+ and bifluoride

Yes there is but I don’t know it.

11:40 PM

if the bond order of dicarbon is 2, then why is it triple bonded?

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The Periodic Table

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