The Periodic Table

7:55 AM

Hello

@Kaumudi

8:12 AM

I found this gem on meta.SE

user228700

8:55 AM

@ringo: Hi :-)

9:42 AM

@ringo Nice

9:55 AM

@Vedant a self-question...

Hey people look at this. chemistry.stackexchange.com/questions/61181/…

an amazing paradox in chemistry

@dihydrogenmonoxide hi

@Vedant I didn't downvote your answer, but I would

Please address my comments

why??

@Vedant your question does not contain a question; your answer does not contain an answer.

its nota q&A

*not

i m just showing the paradox

see chemistry.stackexchange.com/questions/61181/…

10:02 AM

@Vedant Read the meta post someone else commented. It is supposed to be separate questions and aswers

* see source

@Vedant If your answer is not an answer, then put it in the question.

@Vedant You don't have to delete it.

@DHMO but i did

ok i will get it back

just improve it

did you intend it to be an answer?

it is a potential quality question

i should have renamed it to how to reduce your rep on stackexchange

10:05 AM

> This is NOT a Doubt, but I am spreading knowledge about a paradox in Chemistry

@Vedant If it is not a doubt, then why are you posting it?

Do you expect us to resolve your paradox?

If yes, then would you remove that line?

i saw other post like this and decide to make oneabout the paraox

@Vedant But please delete your answer since it is not an answer.

@Vedant for example?

which answer

nothing

:P

10:07 AM

Please improve your question

see this newscientist.com/article/…

@DHMO how?by deleteing it?

@Vedant If your text is not original, please put it in a quote

However, that would render your whole question in quotes.

i did

oh ok

@Vedant deleting it does not make it better

@DHMO but helps me to keep my rep intact

10:09 AM

@Vedant why not improve your question to earn more reps?

alright chuck lets talk abt smth else

@Vedant you can delete it before you edit it, but don't just abandon it.

And do undelete it after you edit it

@DHMO you seem to be so desperate @DHMO

@Vedant because it is a potentially quality question

why dont you ask it yourself?

10:12 AM

@Vedant because you discovered the article

and I don't feel like earning the rep that you should have earned

chemistry.stackexchange.com/posts/61181/edit

@Vedant I cannot edit a deleted post

even i am not being able to edit it

alright, so undelete it and let me edit it

i dont have a undlete option

10:15 AM

why not?

ok got it

@DHMO @Rubisco and @ringo are the only people i know in stackexchange

almost as if nobody else answer or ask wuestion on stackexcahnge

And Loong

And Martin

and Jan

And Aaron

ya aaron and martin too

10:30 AM

Thank you so much @DHMO

You forgot about ortho

!

orthocresol?? @ringo

Yeah!

dont know him that well

yet

:)

10:40 AM

is your name actually ringo or an abbrev? @ringo

He's got some quality answers

My pseudonym

@ringo they dont show up on my feed :(

You'll see them in the future no doubt

i.stack.imgur.com/npZnW.jpg?s=32&g=1

i.stack.imgur.com/X4T1v.png?s=32&g=1

i.stack.imgur.com/nIChx.png?s=32&g=1

@ringo yup im anew user

2

Well welcome to chem.se

Hope you stay a while

10:45 AM

thanks

A user who doesn't know me?

adds to list of users who will be suspended at 9pm tonight

@orthocresol hehe

@orthocresol who you serious @orthocresol

Currently the list includes: pH13, Loong, and Jan, for being Germans. Rubisco for being Rubisco. And now you're on the list.

lol

OK bYE PEopLE

adieu

LOL just saw Loong's news post

10:53 AM

Hmm?

2 days ago, by Loong

Hahaha

Election closes in 9 hours.

I'm rather impressed with the quality of it

Remember me when you ascend to ultimate power ortho

Yeah, I'll remember to ban you

10:59 AM

Thank you

Maybe I'll finally get some work done

^^

I think the "Be specific" part of the question title grey text needs to be in all caps

A: Let's Plan The Second Iteration Of The Stack Exchange Quality Project!

117

New users need better awareness of what is expected of them when they ask their first question. This is the single most important thing that needs to happen on the Stack Exchange network, in my opinion. If the new Question Ask page will facilitate that, then I am enthusiastically supportive. H...

I've seen that post

LOL

Yeah, a lot of it rings true to me.

11:04 AM

Maybe then people will stop putting what are essentially tags as the titles of their questions

or stop dumping HW

A: Let's Plan The Second Iteration Of The Stack Exchange Quality Project!

No they can't stop yet

I'm getting close to my Steward badge in close votes :)

13

Let mods (and 10k?) know when questions go "hot" Because on small(er) sites, influx from the Hot Questions list can mean a disproportionate amount of not-quite-productive posts. A heads-up for community moderators would be great.

I rather like that one... it's small but it'd be nice

11:34 AM

@ringo was it for me

??

Hm?

Q: How to find the equivalence point on a graph of an acid-base titration curve in microsoft excel, (the raw data is taken from the lab experiment)?

Thank god, questions like these will never, ever go away... they clearly make my day, and the answers ...

-1

Here is the data taken from the lab: Acid pH, Vol (cm3)[ (9.67, 4cm3) (9.08, 8cm3) (8.70, 10cm3) (8.06, 12cm3) (7.93, 13cm3) (4.76, 14cm3) (2.45, 15cm3) (2.23, 16cm3) (2.10, 17cm3) (2.01, 18cm3) (1.94, 19cm3) (1.88, 20cm3)] Thanks

ph titration

@Martin-マーチン lol i was abt to answer it until...... @Martin-マーチン

Honestly... a question how to fill in an excel sheet...

and the answer... use R

I mean, I like the other answer a bit, since it clearly points out the faults of the whole approach, but that code bit... for pete's sake...

Q: About stupid questions asked on Stack Overflow

0

Possible Duplicate: There are no stupid questions - or are there? Short question: Is it okay to ask stupid question on Stack Overflow? Long question: From time to time, people ask questions on SO that they should not have to ask there. We all make mistakes, but some questions already in...

discussion stackoverflow questions quality

11:38 AM

@Martin-マーチン "If all you have is a hammer, everything looks like a nail"

@ringo true ;)

Also... we're turning into math.se

I just had an idea

What if we made a chemistryhomework.SE

Problem fixed

that's never going to work... many have tried to get such things of the ground on area51, but horribly failed

I'm not surprised

haha... yeah...

11:46 AM

@ringo @ringo true

It'd be like tutoring... but for free

oops wrong pic

dsorry guys

and gals

It's pretty nonetheless

yeah... never mind a pretty beach

so much lol: area51.stackexchange.com/proposals/102268/…

hBy2Py

11:53 AM

@Martin-マーチン More like a niche subset of AppliedMath.SE

:32986131 laggy connection?

no imgur was down for a few minutes

@Martin-マーチン y did u delete it

@hBy2Py sometimes it's better for your own health to not open the site

how do i upload the pic :p

@Vedant same picture as before, once should be enough, and why did you post it again?

11:58 AM

thats why

I guess... there's something wrong with your thingy

whose this @Martin-マーチン

??

a bit old... i washed that hat and shrunk it :(

And he’s also pretty good at Super Mario 3,
but he doesn’t use the flutes cause he doesn’t like cheats.
Like the Contra code that he really doesn’t like,
Up, up, down, down, left, right, left, right,
then B, A, B, A, Select, Start you got 30 lives.

GUESS THIS SONG

without googling it

without

user228700

12:32 PM

Hi everyone :-) (again :-P)

user228700

I was reading my copy of Solomon and Fryles and came across this sentence:

user228700

OK, never mind.

12:52 PM

@Kaumudi ?

user228700

1:03 PM

Never mind :-P

That $$s$$ is my final answer and represents my solubility in $$Mg(NO)_3$$, what I took from your comment was that in calculation of $$K_sp$$ Mg's concentration was in molarity (0.02M) but we need it to be in $$g/L$$ since $$K_sp$$ (of pure water) is in g/L. — Akshat Batra 11 mins ago

user228700

My textbook states that "A molecule that beard a negative charge next to the carbonyl group is termed as an enolate".

user228700

Is this correct?

@Kaumudi No, it is incorrect.

It should be bears instead of beard.

But otherwise, it is pretty much correct..

user228700

Haha, typo. Okay, thanks :-)

1:05 PM

Can you draw the two resonance forms for such a compound?

user228700

Yep! :-)

Excellent, so you see where the "enolate" comes from. The C=C double bond plus an OH is an enol, and enolate is simply the conjugate base of that.

user228700

@orthocresol Oh, OK...

user228700

Hey, are u a relative expert in OC?( At least first year of university level)

Well, you could try..

user228700

1:08 PM

Huh? I could try what?

user228700

Asking u questions?

Yeah.

user228700

Okay! I've begun OC today so I might bother u till like, December :-P Is that OK?

Probably.

user228700

OK, thanks :-) BTW, when OH adds to C=C, what does that give?

user228700

1:11 PM

(-)C-C-O-H?

no, C=C-O-H

enol

@Kaumudi Hydroxide adding to an alkene?

user228700

Yeah, like u said before.

user228700

OK, never mind. I'll learn this when I actually get to this.

Eh, about the enol, I only meant that in terms of the name. Actually adding a hydroxide ion to a C=C double bond rarely happens.

But, in theory, it would give what you drew: a carbanion.

user228700

1:13 PM

OK, thanks! :-)

@orthocresol addition reaction?

user228700

1:54 PM

When charges are given on structures of organic compounds (esp. when talking about resonance), do the charges give the formal charges of that particular atom on which it is shown?

@Kaumudi usually

user228700

Are u positive? (No pun intended :-P)

@Kaumudi yes

user228700

OK, thank you.

user228700

Why does more number of resonating structures mean more stability?

2:06 PM

@Kaumudi the charge is distributed to a larger region

things don't like to be charged

user228700

A larger region? Can u explain that?

@Kaumudi if there is no resonance, the negative charge would just stay on one oxygen

now there is resonance, the negative charge is shared among the two oxygen atoms

user228700

OK, this makes a lot of sense, thanks so much!

user228700

And hey, things don't like to be charged because the repulsion decreases stability?

user228700

@Rubisco: Hi :-)

2:14 PM

@Kaumudi I never understood why things don't like to be charged, but I think your explanation makes sense

user228700

OK.

@Kaumudi Low

user228700

And having equivalent canonical structures increases stability because the contribution from each structure increases, thereby sort of increasing the number of resonance structures, yeah?

@Kaumudi This is not necessarily true.

Quantity is only one factor; quality is another.

user228700

Oh, really? This is always one of the rules :/

2:19 PM

You can have 1000 resonance forms, but if 998 of them are unstable and contribute very little, then it is no better than just having 2 resonance forms.

Yes, I have seen this misconception appear far too many times on main site.

user228700

@orthocresol Riight, so that depends on how much each structure contributes, yeah?

Yeah. And the amount that each structure contributes is proportional to its stability.

@orthocresol ﾍ(　ﾟ益ﾟ)ﾉ┌┛Σ(ﾉ´ω`)ﾉ

@Rubisco You better savour your last moments of freedom.

@Kaumudi So, if all resonance forms were created equal, then more is always better. But this is not always the case, so be careful.

The usual question that crops up is: is acetic acid or phenol more acidic?

user228700

OK, so the better statement would be "The higher the number of equivalent structures there are, the higher the stability, yeah?

2:22 PM

It doesn't necessarily have to be equivalent - although equivalent structures always contribute a large extent.

user228700

Yes, OK...

I don't think it can be generalised into one single sentence. It's kind of a case by case thing.

user228700

How do we determine if two structures are equivalent, then?

See if you can flip one into the other.

@orthocresol (ง ° ͜ ʖ °)ง

user228700

2:24 PM

Hey, but can't we flip every resonance contributor and get all the others?

These two, for example, are equivalent because you can interconvert them simply by rotating around the red bond.

user228700

Ohh, u mean that flip.

Yeah, I had to give an example, flip was very vague :)

user228700

OK, thanks :-) And is that what I said about the charge thing true?

user228700

13 mins ago, by Kaumudi

And hey, things don't like to be charged because the repulsion decreases stability?

2:28 PM

Hmm...

Essentially, yes.

Basically, without resonance, the negative charge is squeezed onto one single oxygen. (if you look at the acetate ones again)

If you spread the negative charge out more, then there's less repulsion.

user228700

Makes sense!

user228700

I think I'm finally learning OC so that it's actually making sense! :-P

This is just the start :)

But the start is very important.

user228700

Yes, everybody says that :-)

@Kaumudi what about phenol?

user228700

2:30 PM

OK, thank you!

user228700

@DHMO What about it? (Stomach needs dinner. Be back in awhile)

@Kaumudi we were comparing acetate vs phenolate

@Kaumudi Many lessons in chemistry start making sense after you're through with half the course.

@Rubisco I just realised I will be busy at 9pm.

O.O

2:34 PM

So I can't post my congratulations post to you and Loong.

how many hours left?

Oh, I thought you meant you're gonna be busy suspending me.

5 hours.

@Rubisco Nah, I genuinely have something on tonight :D

We both know we both don't know who is the winner.

At least we can congratulate Loong upfront.

2:35 PM

Yeah. Let's just post an anticipatory congratulations post.

Let's just congratulate all three of you

@pentavalentcarbon @orthoseal @enzyme @Loong Congratulations!

pentavalentcarbon

...

@pentavalentcarbon sorry

@pentavalentcarbon sorry

hBy2Py

@Rubisco Works that way with a lot of stuff.

Chemistry also is sort of this progressive series of "well, we told you this is how it works last time, but it's actually more complicated... like this"

@DHMO Things dislike being highly-charged to the point that there's such a thing called a "Coulomb explosion", where multiply charged species rip themselves apart into singly-charged fragments

E.g., Potential energy surfaces in Coulomb explosion of polyatomic molecules: Benzene and cyclohexane trications and acetylene dication