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1:13 AM
@orthocresol I see you spying on me and penta
:p
 
I have to monitor all chat messages to make sure that you are not doing anything illegal. :)
Just kidding. I was just curious
I feel quite happy to see that this sort of discussion is happening on the site. :)
 
Afraid we are planning a coup to overthrow your reign of terror?
 
Even if you wanted to, there's no way by which you could do that.
MWAHAHAHA
 
No way that you can think off ;)
 
Now I'm afraid.
 
1:23 AM
Muahahaha
 
At least that fear will keep me up to do my tutorial..
 
Haha lol I am looking forward to go home just so that I can do my hw
Why life..why?
 
SPYING WHAAAATTTTTT
!!tea
 
well I threw away my entire afternoon doing nothing. So now I've gotta make up for it
:/
 
1:28 AM
It's okay penta, he doesn't know about our plans (for now)
 
Even if we did start using encryption to communicate it's not like we have any big red buttons to press...
 
We could make one
 
!!big-red-button
 
That's not fair! You're cheating!
 
1:34 AM
Shucks, got caught :(
0
Q: solution containing 240g of silver nitrate is combined w/ solution containing 200 g of sodium chloride?

LindseyPart 2) If a chemist filters the resulting mixture described above and collects 150 g sample of precipitate, what is her % yield. (SOLVE USING STOICHIOMETRY) predict reaction and provide balance equation & net ionic equation

I wouldn't expect anything short of 100% yield for the precipitation of AgCl...
 
The more I read questions on the site the more I wish I had a big red button.
-3
Q: please solve Q.no 14

regan hello i am having problem with a numerical . I would appreciate a lot if someone could give me the answer with solution

mashes button
 
that's one of the worse ones
 
too bad it would be in very poor taste/impossible to have a "hall of infamy"
 
Your profile description is a "safe space", so if you wanted... it's probably rather rude though
ok.. should stop procrastinating on sleep
 
1:39 AM
nights :)
 
Gnight ortho
 
 
2 hours later…
user228700
3:16 AM
Hi everyone :-)
 
user228700
I've a quick question. This is a structure given in my textbook:
 
user228700
 
user228700
How the heck is it that the third carbon from the left has a unit negative formal charge? This can happen only if it has like, just one more electron on itself and clearly, that's not possible because it already has a filled octet.
 
user228700
4:02 AM
Also, this:
 
user228700
 
user228700
Notice the C connected to the oxygen atom.
 
user228700
4:45 AM
@DHMO Dude, I was able to successfully draw the resonance structures of like 30 compounds only because of the discussions that we had about lewis structures and all. Thank you!! :-D
 
8:35 AM
@Kaumudi Are these correct structures...? Both images have a carbon with more than 8 valence electrons.
 
 
2 hours later…
10:14 AM
@Kaumudi you are welcome
@Kaumudi that carbon only has one attached hydrogen atom
@QuantumCAPUCCINO the first one doesn't
in the second one only oxygen is hypervalent
 
user228700
10:46 AM
...actually, no.
 
user228700
Secret explained it to me at The h Bar:
 
user228700
 
@Kaumudi i wasn't talking about that
@Kaumudi which sentence is wrong?
 
user228700
Yes, well, oxygen does have an expanded octet on the 2nd molecule.
 
user228700
Which molecule did u mean when u said:
 
user228700
10:51 AM
37 mins ago, by DHMO
@Kaumudi that carbon only has one attached hydrogen atom
 
the first one
you asked how come the carbon can have a negative charge
if its octet is already filled
 
user228700
Ah, no, that's not what I meant.
 
alright
 
user228700
Thanks anyway :-)
 
you are welcome
 
11:33 AM
Can anybody explain me why BF3 is formed its shells are also not fully filled .
@Chemobot help me in this
 
 
1 hour later…
12:49 PM
@koolman O.o ?
 
@koolman Chemobot is a bot.
 
@QuantumCAPUCCINO Hush! Don't worry; he'll figure it out....eventually :/
@koolman Ah well... Hey Chemobot, help the guy ;P
 
Boron trifluoride is the inorganic compound with the formula BF3. This pungent colourless toxic gas forms white fumes in moist air. It is a useful Lewis acid and a versatile building block for other boron compounds. == Structure and bonding == The geometry of a molecule of BF3 is trigonal planar. Its D3h symmetry conforms with the prediction of VSEPR theory. The molecule has no dipole moment by virtue of its high symmetry. The molecule is isoelectronic with the carbonate anion, CO32−. BF3 is commonly referred to as "electron deficient," a description that is reinforced by its exothermic reactivity...
 
^ There you go ;)
 
@Kaumudi -___- there was a carbon single bond in between? i need new glasses.
 
12:53 PM
@QuantumCAPUCCINO Everybody here is a bot except you.
 
@Kaumudi was that supposed to be a joke?
Hail John Searle
Wait how did Chemobot do that?
 
@orthocresol I'm not able to comprehend that bip...bip...bip...
 
@Chemobot what is love?
 
@QuantumCAPUCCINO You really do NOT want to know ._.
See? Magic ^_^
 
12:55 PM
but there was a command there
you can type invisible commands?
 
@QuantumCAPUCCINO Nah, you're just seeing things :P
@ortho +1
 
@Chemobot Fellow bot, your onebox procedure has malfunctioned.
 
This bot is awesome
 
@orthocresol I see; this is indeed serious ಠ_ಠ We must summon the Council of Bots to review this serious breach in @Chemobot's conduct!
@QuantumCAPUCCINO Thank @Hippalectryon :D
 
1:00 PM
@Hippalectryon Thank you for the bot.
 
Herr @ortho, are you used to dispensing favours?
 
@orthocresol .....
Can ye do me a huge favour?
 
yeah, what is it
 
@orthocresol Are you sure? It's huge ಠ_ಠ
 
1:09 PM
well you gotta tell me what it is first
lol
 
user228700
@QuantumCAPUCCINO Yeah, apparently, that's how you read it that half-ish bond that doesn't connect the two atoms all the way...
 
@orthocresol I've invited ye to another room (づ。◕‿‿◕。)づ
 
1:30 PM
Props to @orthocresol for being so helpful.
 
I haven't even done anything
 
@orthocresol Yeah @QuantumCAPUCCINO! Quit giving the man credit for something he hasn't done...yet ;D
 
What is the oxidation number of both Sulphur
Someone help me in this
 
8
Q: Oxidation State of the Sulfur atoms in the Thiosulfate Ion

Del PateWhat are the oxidation states of the two inequivalent sulfur atoms of the $\ce{S2O3^{2-}}$ molecule? For all I know is that Lewis Structure does matter in most of the cases.

@AaronAbraham o/
 
1:47 PM
closed as duplicate
2
 
@Mithoron Oh? Hiya Detective! o/
Well then @ortho @Mithoron I'll be off! o/
Need to finish up on Bio. :/
 
@orthocresol :D
 
@Mithoron oxidation state between two same atom is not necessarily to be zero
 
2:03 PM
Whoops! @ortho would you happen to know if Acyloins give a positive result for Benedict's test?
 
The positive Benedict's test arises from oxidation of the aldehyde group, not the alcohol group.
Acyloins are alpha-hydroxy ketones, am I right?
 
@orthocresol Yeah you're right, but don't acyloins give a positive result for Fehling's test?
 
Idk
 
@orthocresol O.O I'm screwed...
 
My high school chem knowledge is lacking.
 
2:06 PM
This isn't high school chem...
:D
 
Well, whatever it is, I didn't learn it... haha
 
._.
@orthocresol Well, I'll take your word for it :)
 
Sign here, please:
 
By signing this agreement, I agree to hold orthocresol entirely free from any liability for any bad outcomes arising from incorrect knowledge.
 
2:11 PM
There you go 3;)
 
______________
 
@orthocresol Yes? O.o
Did that seriously put you off? X'D
Oh come on! I was kidding! @ortho ._.
@orthocresol Quoting Wikipedia:
> Generally, Benedict's test detects the presence of aldehydes, alpha-hydroxy-ketones, also by hemiacetal, including those that occur in certain ketoses. Thus, although the ketose fructose is not strictly a reducing sugar, it is an alpha-hydroxy-ketone, and gives a positive test because it is converted to the aldoses glucose and mannose by the base in the reagent.
ಠ_ಠ
 
2:49 PM
@AaronAbraham No, I just went off.
I really don't know about those
 
Oh @ortho, would you know if @Jan's around?
I don't see him..
But apparently he left a comment on a post a while back...
@orthocresol -_-
@ortho Can I flag this?
-1
Q: i need to solve this 5th question shown in pic below

malik bilal plz i need to solve this question no 5 ASAP

 
@AaronAbraham Of course
 
3:06 PM
@Mithoron I'll take it from you ;)
 
3:55 PM
Dragon's breath is a special type of incendiary-effect round for a 12 gauge (18.5 mm) shotgun. Dragon's breath consists primarily of magnesium pellets/shards. When the round is fired, sparks and flames can shoot out to about 100 feet (30 meters), although some sources claim it extends to 300 feet (91 meters). Dragon's breath is normally chambered in 12 gauge 2 3/4" (18.5 mm × 69.9 mm) shot shell. The rounds are safe to fire out of an improved cylinder bore as well as a modified choke barrel, common on many shotguns. == Overview == While its actual professional combat or tactical usage rem...
:D
@gannex o/
 
Jan
4:08 PM
@AaronAbraham I was around but doing my usual looking at and answering questions route across my four SE sites that I want or have an enthusiat’s badge on so I wasn’t answering just yet. ;p
 
 
1 hour later…
5:28 PM
I have it on my phone but I've just seen there is the same on computer, this is very useful to train yourself at organic chemistry with the quizz mod of the synthesis ! chemistrybydesign.oia.arizona.edu/app.php
 
5:42 PM
@Hexacoordinate-C Nice
Although I didn't look closely.
 
6:17 PM
@M.A.R.i let you 2h :P
@orthocresol do you know the name of the big arrow ?
of the big molecule on the arrox
arrow
 
@Hexacoordinate-C Another NCN ligand catalyst... Are they everywhere? ;)
 
What NCN means ?
 
@Hexacoordinate-C this delocalised carbene part with which ligands of this type bind.
 
And do you know the name of this catalyst?
I add you 1 pt on your average mark of the semester :P
 
@Hexacoordinate-C What name, iupac?
 
6:30 PM
No trivial name if there is one
If you give me the UIPAC name I add 3 points :P
 
I thought the name was N-heterocyclic carbene
 
@orthocresol I heard they're called NCN for short
 
Dunno..
 
If you are able to draw all the catalyst cycle I add 5 pts :P
 
But N-heterocyclic carbene is good if one wants to name it properly I guess
 
And if you cunningly make the teacher answer, you get 10 points.
 
@orthocresol Ha! You found it :)
 
@mithoron Cool. I was thinking of making dragon's eggs, myself. I bought some bismuth for my little brother for christmas. We're going to grow crystals with it, but I figure I could convert some of the leftovers to bismuth trioxide and make firecrackers with it.
 
@gannex Nice, this opalescence is pretty
And firecrackers would be fun :)
@DSVA o/
 
6:50 PM
hi=)
 
@DSVA You have pretty good start on SE IMO
Found your way to chat quickly ;)
 
yeah I like such communities and right now I'm just waiting for correction on my PhD thesis so not much to do anyways:-D
 
7:06 PM
@DSVA Once you dive in there's no way out. BEWARE
 
Well, at least this seems like a place you can find answers beyond just homework, so I'm fine with that.
 
@M.A.R. :D
 
@DSVA It's a relatively small place. But it's growing ;)
 
0
A: Reaction of citric acid and calcium chloride

Hunter BellHow do u answer all the questions on this site?

 
Can someone who is a native english speaker how would I say "different products such like shower gels, hand creams, candles etc)" in the sentence "I made hydro-alcoholic solutions of fragances and their "????" (shower gels, candles, ...). In French they call that "extension de ligne" which is basically translate as "Line extension" but I bet it not means something good and not in a CV. Thank's in advance
 
7:11 PM
@orthocresol well size doesn't really matter. There's a huge german discussion board but it's 99.9% homework questions or questions about undergrad basics. So pretty worthless for anything another than that.
 
@Hexacoordinate-C What . . . You lost me.
 
I am updating my curriculum vitae
I need to do it in English.
During this summer I worked at Givaudan in the fragance application laboratory.
 
@DSVA Indeed the number of apprentices everywhere is smaller than masters. Newbies are way more than experts. This site is no different; I'm a newbie myself. What makes here different is the tools we have to prevent the site from being overrun with such simplistic questions of no value.
 
I made hydro-alcoholic solutions of fragances and with those same fragances I also do for some project products which contains those fragances. Instead of tell each time (Candles, shower gels, etc...) they call that in French "extensions de ligne". I'm looking for a word or an equivalent expression in english
 
@Hexacoordinate-C Do you mean to complete the sentence ''I made hydro-alcoholic solutions of fragrances and their ________'' with something that is equal in meaning to ''different products . . . ''?
 
7:15 PM
Yes
Which means that with the same fragance(s) we did different products
 
Are whole sentences in CVs common?
I would write something like "Process chemist at XY
tasks: preperation of ..."
 
What's wrong with just ''products''?
@DSVA No idea. I don't live in a place where English CVs are common.
 
This too basic and it not give an idea of what it was
 
That said, it prolly should be ''CV's'', rather than ''CVs''
 
Because you can put fragance in a lot of things
07/16-08/16 Laboratory technician at Givaudan (world leader in fragrances and flavours) in fragrances application laboratory. I made hydro-alcoholic solutions of fragrances and their ________ (shower gels, hand creams, etc.).
I do like my teacher tell me to do but I have not a lot of informations
 
7:19 PM
I guess your best shot is to explain what those products are in a separate sentence.
Or
 
But no one really cares about that you put fragrance in different products, they care that you have experience in preperation of cosmetic products. If it's really really relevant for that job what you did exactly you put that in the cover letter.
 
True that
 
I have an idea might be wrong "product range" ?
 
''I have synthesized hydro-alcoholic solutions of fragrances and applications of those fragrances in cosmetics''
 
I have not synthesized them haha
 
7:21 PM
Oh.
 
It was before my bachelor it was really short internship
 
Well, ''produced'', maybe?
 
''made'' isn't wrong, but considering the very common usage, it feels a bit unspecific.
 
In the application lab we just add fragances in the different basis
 
7:22 PM
0
Q: What makes a good antioxidant

John DoeI am doing a school project on antioxidants and i would like to find out what makes a good antioxidant. I know examples of antioxidants such as Vitamin A, C and E but i was wondering what commonality exists between them in terms of chemical structure and bonding. I am a novice in chemistry so a s...

@Ortho what should we do with that heck above?
 
It looks range is not so bad :D
I'll explain also in my cover letter
@dsva thank's for the idea
 
''in a range of different products''?
 
@M.A.R. think it's fine
 
@orthocresol Well, half-biology half-TB half-canonical . . . Not sure I should've clicked ''no action needed''
 
nah... I can envision a good answer to that question
 
7:32 PM
@M.A.R. don't you think that "of different" is superflous ? Because in a range of products it must have different ones ? ^^
 
my understanding of antioxidants is that they basically have to be diamagnetic molecules that can absorb sets of radicals by dimimerizing, allowing them to make all the electrons get paired again... Like glutathione dimerizing at the cysteine, then getting reduced by its reductase... you could also have molecules that can transiently form stable radicals, like vitamin c, which will stop one radical chain reaction, chill for at least 10^-5 seconds, and then donate another electron.

So in general, antioxidants need to be species that can donate single electrons without forming reactive produ
is this a good way of explaining this?
 
They don't necessarily need to dimerize or be diamagnetic. They just need to bind the oxidazing agent in question and form a stable product

In the end antioxidants are just molecules which prevent oxidation, doesn't matter how they do it.
 
8:01 PM
yes, but most examples do it by reducing two radicals, and many will dimerize. Ultimately they need to donate two seperate electrons to two seperate radicals and form species with even numbers of electrons.

I think this is a simple way of giving a general understanding of the relationships between ROS and antioxidants. It's a question of getting your electrons to pair up.
"antioxidants are molecules that prevent oxidation" is a little bit of a tautology
 
8:37 PM
To make electron configuratio I use \mathrm ?
 
@Hexacoordinate-C yes
 
And I'm looking for a word in english but I don't know how to describe it correctly I want to say "énergie d'appariement électronique"
It is the energy that two electrons have when they have opposite spins
 
Spin pairing energy?
 
Yep
thanks
 
9:29 PM
I'm looking for a reference which tells about the fact it will be easier to take an electron from 4s than 3d first I leanred it but there are not all the references in my lectures chemistry.stackexchange.com/questions/62728/…
 
9:40 PM
Is this the wrong way round?:
In an exothermic reaction, less energy is required for bond breaking than is released by bond making. In an endothermic reaction, less energy is required for bond making than is released by bond breaking.
The phrase "If more heat energy is released when making the bonds than was taken in when they broke, the reaction is exothermic." doesn't help either as the sentences ask for the energy required, not released
Would anybody mind helping me out please? Thanks
 
Well my english is not perfect but I would answer yes
bond breaking is always endothermic and bond making is always exothermic
I'm sure of that
 
@Hexacoordinate-C Ok then, thank you! ;)
 
10:06 PM
Hello all
 
@MelanieShebel hi
@MelanieShebel If you like organic chemistry @Jan offers 200 of her/his (sorry I forgot) reputation if you find a mechanism involving NaHSO3 in the hydrolysis step of dihydroxylation ^^
@orthocresol is there a tag for "chemical engineering" ?
 
not that I know of, but you can always search: chemistry.stackexchange.com/tags
 
There is not ugh
 
10:27 PM
Hi Melanie
@M.A.R. I answered the question. I am doing a presentation on oxidative stress for an interdisciplinary class that includes psychologists next week, so I'm working on coming up with a simple explanation that includes some illustrative examples of biological effects.
I figured that was good practice before putting together my slides
@Mithoron opalescence?
 
Toblerone: now with enhanced baseline separation!
(via @climategordon on Twitter)
 
Opalescence is a type of dichroism seen in highly dispersed systems with little opacity. The material appears yellowish-red in transmitted light and blue in the scattered light perpendicular to the transmitted light. The phenomenon is named after the appearance of opals and is an example of the Tyndall effect. There are different degrees of opalescent behaviour. One can still see through a slightly opalescent phase. The larger the particles are, the stronger the scattering arising from them and the cloudier the particular phase will look. At a certain concentration the scattering is so strong that...
 
@MelanieShebel base lines are very important for analyst chemists :P
 
@gannex Or maybe it's another type of iridescence...
Well they pretty and that's the important thing :)
 
10:43 PM
I love Bismuth
 
Jan
@MelanieShebel Is that the new, post-Brexit UK Toblerone? =D
 
Haha yeah
 
Someone just flagged one of my comments as obsolete.
Tsk tsk
 
Which comment?
 
Seems like deleted questions don't get one-boxed.
 
10:59 PM
Maybe it's Jan which just edit one of your edit she wanted to punish you ^^
Someone downvote my answer without say what was wrong for him
 
Jan
It was me xD
I think.
 
Why ? :O
 
Jan
Your link links to a closed and deleted question though, @ortho.
Well, if a comment is obsolete, it is obsolete o.o
 
I tried to make it as simple as possible
 
@Jan Oh yeah. That wasn't the comment that was obsolete. I agree it was obsolete so I deleted the comment :D
I just find it funny that moderators can handle flags about their own comments
 
Jan
11:06 PM
@orthocresol Yeah, my point exactly =D
Why wouldn’t they? They can always skip and the guidelines will probably suggest you skip if you feel a conflict of interest, won’t they?
 
@Jan If it you tell me why please :)
 
What question?
 
@Jan Yeah, it's ethical to ignore the flag if there's a conflict of interest. meta.stackexchange.com/questions/202222/…
But if I were to be an unethical moderator, I could just decline everything
 
Jan
But since you carry the seal of approval you must be ethical ;)
@Hexacoordinate-C Huh, what?
 
-1
A: Electron Configuration of chromium(II)

Hexacoordinate-CWell your periodic table is false, when you're looking for a problem even if it is good to look at something you think you can trust it's always good to look if what you read is as correct as all you learned. How to find the electron configuration : Three rules apply for predicting the gr...

What's wrong in my answer
OK I'm not talking about the close level in energy but as @orthocresol shown it's a bit tricky. However I was looking for something like that to add it in my answer.
 
11:11 PM
I didn't downvote it, but I did have a really hard time reading the first sentence.
 
Jan
Seems to ramble on about a lot of things that are barely relevant to answer the question.
 
I think the answer goes in too many directions, particularly for the asker who seems to be at more of an elementary level.
 
"who seems to be at more of an elementary level." ? How do you see that
 
Well it appears he's just learning about electron configuration for the first time. I was asked a similar homework question in my gen chem class.
 
11:36 PM
-1
A: Can magnetic fields affect a chemical reaction?

leoelectrochemical reactions a mechanical mechanism formed threw the spin and magnetic reaction if you would like to hear more email me to find if your intrest are the same as mine leostack.com@gmail.com GOD BLESS TRUMP!

Can't decide whether this is spam, rude/abusive, or just NAA...
Seems like it got one moderator rude/abusive, so rude/abusive it is.
 
@orthocresol All of the above. Just delete it
 
Oh wow, missed it, but did see the question up on the front page.
 
Jan
I was hoping for a late answer review Y___Y
 
Alright, reppin' up to that 2k.
Well, close.
 

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