The Periodic Table

« first day (1833 days earlier) ← previous day next day → last day (2853 days later) »

CowperKettle

04:39

> Remember that beryllium ions in solution exist as the hydrated ion, [Be(H2O)4]2+. The beryllium has such a strongly polarising effect on the water molecules that hydrogen ions are very easily removed from them.

I don't understand this last sentence

Beryllium is basic, not acidic.

If hydrogen ions were removed, it would have created an acidic environment

chemguide.co.uk/inorganic/group2/beryllium.html

CowperKettle

05:25

Good morning, fellow periodicals (transition metals included)

Виступали козаченьки - ukrainian cossack song

►

Song of the day

(0:

2 hours later…

paracetamol

07:22

@CowperKettle Speaking of Cossacks...

Betrayal of the Cossacks

►

3:)

CowperKettle

08:21

@paracetamol yes, history is ugly

Cossacks have perpetrated quite a lot of ugly gruesome things

They killed Jews right and left in the 17th century Ukraine

As any warrior caste, they were sometimes on the wrong side

However, the song about Berestechko is beautiful

1 hour later…

paracetamol

09:52

@CowperKettle Yep, history is very ugly >_<

@CowperKettle Eh?

@CowperKettle That doesn't sound so bad ;D (I mean, they weren't the only ones :P)

@CowperKettle True, that.

CowperKettle

Will CuO react with Cl2?

paracetamol

10:24

@CowperKettle I ran a cursory Google search... there's no reference to it actually happening ._.

CowperKettle

11:07

> KHCO3 + H2SO4

Do we get K2SO4 or KHSO4?

On what it depends?

paracetamol

11:18

Blank expression

Oh @Cowper! We've got @Ivan in the room! \o/

CowperKettle

11:43

Why would not NO2 react with CaO?

I read that with water it might, but why not without?

hmmm

Good afternoon, Ivan

(back to reading chemistry)

Ivan Neretin

Hello. I would expect them to react even without water.

paracetamol

@Cowper ^

CowperKettle

12:16

@IvanNeretin Thank you!

I have this problem and I've no idea which set to pick for NO2

Probably No. 3

> 2CaO + 4NO2 = Ca(NO3)2 + Ca(NO2)2.

Found this online

Looks like a disproportionation reaction

I wonder why it happens at all

And how

Ivan Neretin

What's the criteria for picking a set? Reacts with everything? Reacts with nothing?

CowperKettle

Yes, reacts with each of the chemicals

It's a training set of tasks for the annual Chem Exam in Russia

Яндекс ЕГЭ по химии, in other words

> $2NO_2 + 2KOH → KNO_3 + KNO_2 + H_2O$

It's interesting. Seems like NO2 always wants to disproportionate itself

Ivan Neretin

Got it. So what are your picks for А, Б...?

(Yes, NO2 is like that.)

CowperKettle

My picks are 1, 5, 3, 1

Here's the question

(I'll go and read some more chem)

Ivan Neretin

могут повторяться, they say. so using 1 twice is OK.

Then your picks are fine.

Berry Holmes

13:10

@IvanNeretin Welcome to the chat room!

@MelanieShebel @MelanieShebel What's wrong with the titles?

Berry Holmes

13:28

Let me say hi to Mr. @CowperKettle

Inspired by you

Let's say hi to @CowperKettle
He is always so very gentle
Usually solving lots of questions
Sometimes he gives good song suggestions

CowperKettle

14:37

@BerryHolmes Thank you, Berry!

Q: Salt Bridge in Galvanic cell

Sorry if this questions are already asked . I have a couple of questions Why a salt bridge is used in a galvanic cell? And why a circuit does not completes if we don't add a salt bridge in a galvanic cell? Zinc and coppers are conductors then why we use salt bridge to complete the circuit?Why is...

electrochemistry

I would be glad for an exhaustive answer

I also have no idea why it is there

Fawad

14:55

Structure of $CH_3^+$ is not same as structure of ammonia because of different hybridization?

CowperKettle

15:49

What can I use to obtain methanol from carbon monoxide?

There's five options, an neither seems to fit

And if I ask this on main site, downvotes again..

socratic.org/questions/….

ooops

Looks like $H_2$ does it

> The synthesis of methanol from carbon monoxide and hydrogen gas is described by the following chemical equation: CO(g)+2H2(g)⇌CH3OH(g) The equilibrium constant for this reaction at 25 ∘C is Kc=2.3×104.

CowperKettle

16:16

I found it in some obscure book

Is this the right mechanism?

So we first get methanal (formaldehyde)

and then, all of a sudden ... CH3OH

but how?

Does H2 split in two by itself?

D'oh

M.A.R.

Discussion on lack of research being a close reason

3 hours ago, 54 minutes total – 69 messages, 5 users, 4 stars

Bookmarked 6 secs ago by M.A.R.

Good discussion there CC @Ortho

CowperKettle

I wonder if I can ask this on main site

hBy2Py

Possible expostulation target for @Loong:

Q: Looking for the accepted name of a lactone with two keto groups

Looking for the term applied to a lactone ring species with two keto groups attached to the ring. A lactodione? dilactone?

organic-chemistry

Loong

Yeah, I saw that.

hBy2Py

16:33

It's definitely not the best-written question, though

Loong

Does that mean two C=O groups in addition to the C=O group of the lactone?

hBy2Py

Probably just two C=O groups total

But three C=O's would be a natural extension of the question, and answer.

(probably?)

Loong

Maybe OP just discovered succinic anhydride?

hBy2Py

Mm, could be

A structure would've been a great thing to include.

Berry Holmes

Hello everyone

hBy2Py

16:38

Hiya

M.A.R.

@BerryHolmes \o

Berry Holmes

Well, I'm a high school student and I'm trying to understand the mechanism of cyclotrimerization, but the Wikipedia article is too high a level for me to comprehend. Is asking for a simple explaination for the same on topic here?

hBy2Py

@BerryHolmes Seems a reasonable question to me

Berry Holmes

@hBy2Py thank you so much, I'll formulate a question and post it soon

hBy2Py

I don't see anything already on the site that seems related; this search and this search definitely don't yield anything relevant.

Berry Holmes

16:46

True, they're interesting reads nevertheless.

Secret

17:09

Hey guys, I am planning to optimise a molecule which has triphenylphosphine as a ligand. This means I will need to do a conformation analysis. However, given that the conformers from rotating each of the phenyl may not be independent (thus I cannot just run 3 PES scans rotating one phenyl at a time and then the 3D PES will be just the product of the 3 1D PES), any good advice on how to do this conformation analysis more efficiently?

M.A.R.

17:30

@Ortho can you check if this user is a sock of this one?

orthocresol

17:54

@M.A.R. It is the same user; however, I do not think there is foul play.

wait

M.A.R.

@orthocresol there is

orthocresol

when I wrote that, I hadn't seen the question.

M.A.R.

You're welcome

I think just merging the accounts would do the trick

orthocresol

only CMs can merge

i guess we will monitor it and see how things go

thanks haha

Berry Holmes

:o sock?

orthocresol

17:59

Sockpuppet (Internet)

Note: This page is not a policy or guideline. The policy page for this topic is located at Wikipedia:Sockpuppetry. A sockpuppet is an online identity used for purposes of deception. The term, a reference to the manipulation of a simple hand puppet made from a sock, originally referred to a false identity assumed by a member of an Internet community who spoke to, or about, themselves while pretending to be another person. The term now includes other misleading uses of online identities, such as those created to praise, defend or support a person or organization, to manipulate public opinion, or...

Q: How should sockpuppets be handled on Stack Exchange?

So a high-reputation, highly-active user has already been dinged once for a sockpuppet, and I just dinged him again. He probably has another sockpuppet as well. What are the guidelines for handling users who game the system in this fashion? Specifically, How can I be sure I'm looking at a soc...

discussion moderation sock-puppets moderator-faq

Fun fact: I found that question by googling "nog shine".

@M.A.R. regarding this, there is also something I saw on Biology

the answer to Q1 here: biology.meta.stackexchange.com/a/3594/19647

generally I think that lack of research is a poor criterion for closure

I'm just not sure how to go about changing it. as you said the other day, there is also the issue of trying to stop low-Q answers. There's also a second benefit of closure, they get deleted quickly.

Berry Holmes

@orthocresol Now I know! Thanks. Nog shine haha

M.A.R.

18:47

@MelanieShebel they're not that bad

I was expecting "chem doubt halp"

Or maybe you've edited the ones that needed editing

2 hours later…