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12:18 AM
@Nova be patient, someone might answer it
 
Okay
 
@Nova just assume that you are right ... no one would post an answer with "yes, you are right" because that is not considered to be a good answer. you might get a comment on that.
 
Okay, I just thought it was an important conceptual question that a lot of my classmates wanted verification with. I attempted to answer it as I wrote it to illustrate my approach to the problem so future readers could relate.
 
12:35 AM
@Nova what do you consider to be the theoretical yield?
 
The amount of product that should be produced
 
I think that Beerhunter is right and it should be 100%. If you have by-products, those 100% are simply lowered but that does not change the calculation.
 
12:54 AM
Yup, I totally get it. Thanks for pointing his answer out
 
 
3 hours later…
user116211
4:21 AM
@Martin-マーチン: Have you talked 15 min ago or I'm mistaking?
 
user116211
 
4:33 AM
@user36790 I said something in the g-block elements, maybe that's it. I was about to make myself known, when I got distracted by my work :D
Soooo.... I'm back.
 
user116211
@Martin-マーチン O.O
 
user116211
You know, Martin, there is another man who is really like you- means you have alike faces.
 
There is? A doppelgänger?
Who?
 
user116211
 
You know, under these hats, there is not as much hair left as with this guy ;)
That's why the hats...
 
user116211
4:42 AM
@Martin-マーチン O.O
 
Also, he is probably tall and muscular... and I am... well... not.
I could maybe be his Mini-Me
 
user116211
BTW, he is Brandon McCullum, the retiring captain of Black Caps- the New Zeleand Cricket team.
 
user116211
@Martin-マーチン Your face and his quite the same!
 
user116211
Brendon Barrie McCullum ONZM (born 27 September 1981) is a New Zealand professional cricket player who currently plays as a batsman for the Otago Volts at provincial level, the Gujarat Lions in the IPL, Middlesex in the English domestic league in 2016, and New Zealand internationally. He is the current captain of New Zealand in all three forms of the international game. He played for the Kolkata Knight Riders from 2008–2010 and again from 2012–2013, while in between he played for the Kochi Tuskers Kerala. He played the 2014 and 2015 seasons for the Chennai Super Kings. McCullum was a wicket-keeper...
 
Hehehe... after his retirement, if he grows himself a nice little belly and looses his hair ;)
he is smaller than me, who'd have thought...
 
user116211
4:48 AM
@Martin-マーチン You are 100 yrs old??
 
user116211
Don't underestimate yourself!
 
:D
I won't... would be cool to meet him though...\
 
user116211
@Martin-マーチン :D
 
user116211
You follow cricket?
 
No. It's not popular in my country. I like football (soccer)
 
user116211
4:54 AM
@Martin-マーチン o.O
 
It's hard to understand the rules if you have no people around that actually are able to explain them to you
 
user116211
@Martin-マーチン Cricket runs in our vein ;P
 
user116211
@Martin-マーチン Agreed.
 
@user36790 From that statement I would guess you are from India or Pakistan :)
 
user116211
@Martin-マーチン India :D
 
user116211
4:56 AM
The Germany national cricket team is the team that represents the country of Germany in international cricket matches. The German Cricket Federation, which organises the team, has been an associate member of the International Cricket Council since 1999, having previously been an affiliate member from 1991. The national team made its international debut against Denmark in 1989, playing as West Germany. It has since played regularly in European Cricket Championship tournaments, as well as twice in the lower divisions of the World Cricket League. In 2001, Germany also competed in the ICC Trophy (now...
 
user116211
Cricket in Germany has a history going back to 1850, when a group of people from England and the United States founded the first German cricket club in Berlin. Several more teams were later founded in Berlin and the rest of Germany, as well as a national federation. Cricket lingered on over the following century, with occasional visits of German players to England and British and other foreign teams touring in Germany, but only when it got a foothold in the German universities in the 1980s did the number of German cricket clubs and players start to grow again. Nevertheless much of the cricket to...
 
I met a guy from Pakistan who was really into cricket, and he showed me some footage and then said, did you see that? I was like yes, but why is it special and he could not explain...
I read a few things about the rules, sounds like fun :D
 
user116211
@Martin-マーチン what video
 
user116211
Even I didn't know Germany has a national team authorised by ICC
 
4:59 AM
I few years back there was a post-doc from india, and he was into cricket, i think he played in the backyard with his son
@user36790 me neither
 
user116211
o.O
 
I don't remember the video, must have been last year or the year before in a tournament
and there was on guy bowling and the batter hit the ball to the outer bounds and caught it in the air but he was leaving the field so he threw it in the air again while still jumping, rushed back in the field and caught it again...
It really looked very athletic, but I did not really understand what was the consequence of it and the guy could not explain it.
 
user116211
@Martin-マーチン This is typical ;P
 
He went bat crazy about it... maybe it was a guy from pakistan and maybe it was a winning move... i don't know
 
5:04 AM
he always wanted to make me interested in cricket but then never explained anything... it was tiring
 
user116211
Enjoy this Aussie taking a splendid catch.
 
user116211
@Martin-マーチン o.O
 
that was a weird song...
 
user116211
Also check this:
 
user116211
5:09 AM
Indian players, SA players are the most athletic fielders in cricket.
 
user116211
And Indian Players are one of the richest community in sports world.
 
user116211
We are mad for them, actually.
 
user116211
But the fact is,
 
user116211
they don't represent India in any game
 
user116211
but represent BCCI, the cricket organization.
 
user116211
5:10 AM
But that doesn't matter ;D
 
haha, isn't that the case in many sports?
 
user116211
@Martin-マーチン means?
 
well in football, the players also represent clubs rather than countries
 
user116211
@Martin-マーチン o.O
 
then when the world cup or something comes along you have a national team, but that represents the association
 
user116211
5:14 AM
O.O
 
for example, there is no UK football team, because england, scottland, northern ireland and wales have their own football associations
so in the world cup they represent them, not the UK
 
user116211
@Martin-マーチン that country is intricate.
 
user116211
The English founded cricket and they never World Cup!!
 
user116211
While its colonies are winning more than one time
 
true, but it's gotten a lot more simple than a couple of decades ago
 
user116211
5:16 AM
Ind-2
 
Haha, the english founded football and only won the worlcup once ;)
 
user116211
Aus-5
 
user116211
@Martin-マーチン That was controversial too ;P
 
true
So when the ball is caught in the field in cricket, the bowler is out, right? That's why it is a big deal.
the batter is out?
 
user116211
5:21 AM
@Martin-マーチン generally out; but depends on other factors too.
 
World cup 2010, the revenge ;)
@user36790 I think cricket is really an interesting sport, yet the ball is so small and so fast, it's almost impossible to see
 
user116211
@Martin-マーチン it's really heavy.
 
user116211
@Martin-マーチン lol
 
user116211
if you can't stop the ball or catch the ball properly, you may get severe strain.
 
user116211
cut or injuries like the disjoining of the thumb from the mainhand. So severe
 
5:30 AM
I've seen pictures where players did get hit in the head with that ball, that looked very ugly
it's basically shooting with cannon balls
 
user116211
@Martin-マーチン yeh! Many lives gone that way.
 
user116211
The most famous case is Phil Hughes of Aus .
 
tha's horrible
 
user116211
Phillip Joel Hughes (30 November 1988 – 27 November 2014) was an Australian Test and One Day International (ODI) cricketer who played domestic cricket for South Australia and Worcestershire. He was a left-handed opening batsman who played for two seasons with New South Wales before making his Test debut in 2009 at the age of 20. Hughes scored his first Test century in March 2009, aged 20, in his second Test match for Australia, opening the batting and hitting 115 in the first innings against South Africa in Durban. This made Hughes Australia's youngest Test centurion since Doug Walters in 1965...
 
user116211
5:45 AM
@Martin-マーチン: It was a nice sportly talking! Gonna have to study, Bye!!
 
user116211
See u later ;D
 
@user36790 Yes it was nice, have fun studying :D
 
user116211
;)
 
11:06 AM
@user36790 How is that like @Mart? Haha,
 
11:18 AM
@user36790 Oh shit I totally am not gonna play cricket in my life.
 
user116211
@IͶΔ Unfortunate things happen; but it's courage to resume it again.
 
I don't wanna be courageous if it means I'm gonna get killed while having fun.
That's why volleyball is an awesome sport.
 
user116211
@IͶΔ All are not getting killed, BTW.
 
They're first taken to the hospital and then get killed? :P
 
user116211
@IͶΔ hmmm
 
11:23 AM
AFK taking a nap thingy
 
user116211
@IͶΔ: Ask a question?
 
user116211
@IͶΔ oh!
 
3:53 PM
Hullo @tsc!
 
user116211
is $dG=0 $ for reversible process?
 
Yes.
 
user116211
@IͶΔ So, why do they say $dG= w'$, the max. non-expansion work?
 
We're talking about different moments.
 
user116211
@IͶΔ elaborate?
 
3:56 PM
Delta G equals zero in equilibrium, not in any other times.
dG, well, I have never done my calculations based on it, but it logically should follow the same pattern.
 
user116211
why is not in the first law non-expansion work is taken into consideration?
 
First law of thermodynamics? Why not?
 
user116211
@IͶΔ I don't know.
 
Is it something your textbook has written?
 
user116211
Only when to prove $dG= w'$ then they use $\partial W= -PdV +w'$
 
user116211
4:02 PM
otherwise, only $\partial W= -PdV$ is used.
 
user116211
This is hypocrisy!!
 
user116211
4:13 PM
@IͶΔ: What's the difference between $dG= -dH + T \,dS $ and $dG= V\,dP - S\, dT\;?$
 
@user36790 Nothing.
If they give you the values in 1 to plug, you do. If they give you the values in 2 to plug, you do.
 
user116211
@IͶΔ Could you deduce one from another?
 
You sure it's SdT and not TdS?
 
user116211
@IͶΔ yes
 
Then O_o
Nope.
Ask a question on chem, and I have to go reread this stuff.
 
user116211
4:18 PM
@IͶΔ ok
 
user116211
I know Chester Miller gonna come and write an ans
 
Yay? I haven't written an answer on the main for quite some time.
 
user116211
@IͶΔ i'll give a shot; this has been bothering to me today
 
user116211
5:07 PM
@IͶΔ they can't be same; they are different actually .
 
Who?
@Mart and @pH13? I disagree.
 
user116211
@IͶΔ me.
 
You can't be the same, you are different actually? That's news.
 
user116211
@IͶΔ: o.O
 
5:57 PM
Wow, what a mature edit.
I wish all edit summaries were like that. CC @Mart
 
user116211
o.O
 
user116211
Most of the times, I get edits where the units are not upright; I hate this.
 
O.o
 
6:15 PM
@user36790 First you don't put H and later your surprised it should be there
 
user116211
@Mithoron H is in the definition of G
 
user116211
$\Delta G= -T\Delta S_\textrm{universe}= \Delta H- T\Delta S$
 
As @IͶΔ said later you're mistaking equilibrium with reversibility
 
IͶΔ is always right.
 
You can't say there's no change in enthalpy in reversible process
 
6:20 PM
Except when he isn't.
 
user116211
@Mithoron Not said either in any way.
 
user116211
@IͶΔ hahhahahha
 
G=H-TS - why are you constantly eliminating H?
 
user116211
@Mithoron I'm not eliminating. I've edited it just to show that.
 
Then if TS= 0 then G=H
 
user116211
6:24 PM
@Mithoron didn't know that ;P
 
I angry. Meta post no getting answer. ಠ_ಠ
 
user116211
@Mithoron: What according to you would be the equation?
 
user116211
7
Q: Policy on questions in basic mediums

IͶΔLet's sit down and have a talk. Recently, we're closing a lot. 1 A good portion of the "offending" posts have been questions that either touch very basic concepts of chemistry, or are ones that you can get an answer to by inserting in a magical machine named Google and watching the page load. ...

 
No, not that one.
The TRE (II) thingy.
 
user116211
10
Q: Throw in an idea for TRE (II)

IͶΔTRE (I) was a success . . . depending on how you define it, but the majority agree, hope or guess. I could've just gone on and thrown in a new plan of attack since there are only so many ways to get a list of questions and edit their tags and stuff, but I first wanted to see what you guys find f...

 
user116211
6:29 PM
^^^
 
Yeah.
 
@user36790 Instead of putting stupid cross simply put H and you don't get G=0 but =H and that's OK
 
user116211
@Mithoron Are you saying $\Delta G = \Delta H- T\Delta S$?
 
Yeah... you can't treat enthalpy as constant - lacking in your second equation
Your edit says it's zero because it's zero
 
@user36790 That's how I always thought of it.
 
user116211
6:44 PM
I was not talking about the entropy of the system but rather the universe.
 
7:19 PM
@MadScientist o/
 
MadSci pops in and out.
I think he only chats in TL @Mith.
 
@IͶΔ Know he doesn't answer but still... ;)
@IͶΔ saw panda 2
 
How was it?
 
user116211
 
@IͶΔ Ok, reminds me of Wizard of Earthsea, and that's big compliment from me
 
7:24 PM
@Mithoron ?
Flags @Mith as NAA
 
@IͶΔ I mean it was nice, had some similarities to one of my favorite books
 
user116211
@Mithoron: $dG= Vdp-SdT$ if pressure and temperature are constant, then the equation yields $dG= 0$ ;/
 
That's why that equation sucks.
I'm telling you! It should be PdV and TdS.
> dU = TdS - PdV
 
user116211
@IͶΔ Actually it is in every thermodynamics book: be it Fermi's, Reif's, Atkins or Schroeder's
 
@user36790 google.com/…
 
7:36 PM
@user36790 And that would be situation when thermodynamically nothing happens...
 
Wait @Mith, you sure it's not PdV and not dPV?
 
user116211
 
NOW I SHOULD FLIP A TABLE!
 
user116211
@IͶΔ stop yelling ;P
 
@IͶΔ In this situation it wouldn't matter. differentiation depends on situation
 
7:42 PM
Well, the biggest problem here is that I don't know much differentiation.
Screw you math.
 
pdV - pressure const, Vdp - volume const
 
Right.
 
8:33 PM
Meanwhile, back at chem
-1
Q: Stoichiometry I NEED HELP

user27148Hydrogen fluoride is used in the manufacture of Freons (which destroy ozone in the stratosphere) and in the production of aluminum metal. It is prepared by the reaction: CaF2 + H2SO4 → CaSO4 + 2HF. In one process, 6.00 kg of CaF2 is treated with an excess of H2SO4 and yields 2.86 kg of HF. Calcul...

 
 
2 hours later…
10:51 PM
When you have an acid what determines if it fully disassociates like NHO3 and only partially disassociates like HCOOH
 
11:05 PM
@WDUK I guess answer it's complicated doesn't satisfy you? :D
 
lol not really though it seems the course does not go into that complex anyway
i have to state and explain which of HNO3 and HCOOH has a higher pH and why
i don't have the faintest idea where to begin
 
0
Q: How to determine which substance is the strongest base / acid?

VoldemortWhat is the simplest way to determine which substance, from a list, is the strongest base/acid? For instance, which is the strongest acid here? $\ce{HClO}$ $\ce{HClO2}$ $\ce{HClO3}$ $\ce{HClO4}$ I found this question: Which of the following is the strongest base? Didn't really...

 
the link on that site, for checking answers to questions it gives a dead url
might try kahn academy
 
5
Q: How to assess the strength of the acid?

Jx1 Which is the stronger acid in the given pairs? $\ce{HClO3}$ and $\ce{HBrO3}$ $\ce{HClO2}$ and $\ce{HClO}$ $\ce{H2Se}$ and $\ce{H2S}$ given that the number of oxygen atoms is the same, the most electronegative atom should result in a stronger acid, thus $\ce{HClO3}$ is stronge...

@WDUK Check links in my answer
 
hmm they look very different to the way my book is trying to explain it using logarithms
 
11:15 PM
@WDUK In your case it's delocalisation with 2 oxo groups and one. Stronger delocalisation of negative charge gives stronger acid
 
why would HNO3 be stronger for H+ over HCOOH ?
HCOOH has two hydrogens so couldnt it not become 2H+ which is twice as many
 
Yep, complicated ;)
 
hm i see
not sure what the question wants from me then if its complicated =/
i have to explain why one is higher ph than the other
 
Dissotiation constant not ph
@WDUK One hydrogen isn't acidic - is connected to C atom
 
isn' the other connected to O ?
ill look up how to calculate the dissotiation constant, though no volumes are given in the homework
it does state equal moles of both acids disolve in equal volume of water but not what the volume is
 
11:22 PM
@WDUK In this situation acidic strength can be compared
 
how so ?
from the constant?
 
If molar fractions are equal then stronger acid's solution will have lower pH
And you don't have to think about constant, how nice
 
do you have a link that explains this stuff well ? wikipedia seems overly complex for my level
 
I can look around
 
thank you
 
yeh it didnt explain where those numbers came from
even kahn academy does not explain why acetic acid partially disassociates
its like every where i read we are suppose to take it for granted
 
@WDUK Man... they illustrate rules. You can get more or less accurate approximation with pauling rule, but chemistry is fundamentally empirical
 
they don't highlight a rule that determines why its a weak acid other than it doesn't fully dissasociate
 
thanks will take a read
 
11:47 PM
@WDUK "weak" is artificial. dissociation strongly depends on concentration. Higher concentration gives lower degree of dissociation but solution gets more strongly acidic
 
so if both give off the same amount of H+
but one gives off OH-
does this lower the concentration of H+ because they become H20
 
@WDUK you mean reaction with base?
 
HCOOH = H+ + CO + OH- = weak ?
compared to NHO3 = NO3- + H+
 
You've got to be kidding
 
what?
 
11:51 PM
@WDUK o.O
 
So would it be H+ + COOH- ?
 
Yesss
 
bases give off OH- so why wouldn't that dissasociate
 
1
Q: Why is there a charge on COOH⁻¹?

JohnnyThe dissociation of formic acid ($\ce{HCOOH}$) is: $$ \ce{HCOOH -> H+ + COOH-} $$ Why is there a charge on $\ce{COOH^{-1}}$ though? Is it achieved through: $$1\times(\ce{C^{4+}}) + 2\times(\ce{O^{2-}}) + 1\times(\ce{H-})?$$ Does carbon exist as a 4+ ion? Also, as a somewhat unrelated questio...

1
Q: Structure for nitrate ion?

1110101001 Why is the above structure not considered a valid structure for the nitrate ion? Is it because adding a double bond reduces the formal charges present on the nitrogen? Does the above form exist anywhere?

 
that first link doesnt really explain why one H+ will split off from HCOOH
but not a different one
 

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