how was chemistry paper 22

[Resha rimaz]

from what i have found so far, there may be:
-nitrogen and sulphur
-flame tests
-kc calculation (not sure) + definition of weak base (im guessing there will be no q from enthalpy/rate of reaction- so study the equilibrium chapter )
-isomerism+tricky organic stuff, also somewhere they could ask what functional group is tested using NaCO3
-some hard-asss moles questions, with %impurity (some say its supposed to be 91% or close)

how did u get hold of all dis info b4 sittin 4 d ppr????????????

 

[Resha rimaz]

ppl, lets pls discuss the ans aftr 24 hrs in dis thread ...k????????????????????????????

 

[s_hithappens]

well thats not exactly very helpful (though it saved a little time during revising). also its kinda common sense that theres gonna be tricky organic stuff and moles crap- all p2's have that one!

anyways guys we people are done taking the exam and thanks so much for not helping, we'll remember that.

 

[kavysista]

What was % impurity???

i gt 91.5%

 

[Raiyan3]

I have done the exam. Someone PM me the percentage purity answer. I think i really messed it up

 

[SB29597]

I have done the exam. Someone PM me the percentage purity answer. I think i really messed it up

I got 91.22- and no one give me the 24 hour bullshit because people will be giving different variants by now

 

[Raiyan3]

I got 91.22- and no one give me the 24 hour bullshit because people will be giving different variants by now

Oh shit bro, my friends got around 91 aswell. i screwed it up and got around 23 somthing *cries*

 

[SB29597]

Oh shit bro, my friends got around 91 aswell. i screwed it up and got around 23 somthing *cries*

How on earth did you get 23? Lets hope you screwed up towards the end and not at the beginning of all those mole questions
It was kind of simple, overall

 

[s_hithappens]

LOL @ SB29597 exactly

btw what equation did you use to explain weak base?? nh3+ h20-> nh4+ +oh-? this one.

also what was the ester answer at the end, what is the identity of R? ethanoic acid??

 

[Raiyan3]

How on earth did you get 23? Lets hope you screwed up towards the end and not at the beginning of all those mole questions
It was kind of simple, overall

Yeah it was fairly easy! Goddammit i screwed up the moles question :/ Nothing to do though...

 

[SB29597]

LOL @ SB29597 exactly

btw what equation did you use to explain weak base?? nh3+ h20-> nh4+ +oh-? this one.

also what was the ester answer at the end, what is the identity of R? ethanoic acid??

Yes to both
*High Five*

I think we rocked this exam

 

[SB29597]

Yeah it was fairly easy! Goddammit i screwed up the moles question :/ Nothing to do though...

Chill, the great part is that you can always give it again
Are you giving english tomm?

 

[s_hithappens]

oh thank god, *high five* i think i missed a couple marks though, O.N. of N in nh3 is supposed to be -3, and i wrote +3!! also i messed up the pressure of contact process (should be 100 kPa, i wrote 100 atm) *facepalm*

 

[s_hithappens]

and raiyan3, dont get upset, you probably messed up something at the beginning, you'll still get marks by error carried forward, given you got the method right.

 

[SB29597]

oh thank god, *high five* i think i missed a couple marks though, O.N. of N in nh3 is supposed to be -3, and i wrote +3!! also i messed up the pressure of contact process (should be 100 kPa, i wrote 100 atm) *facepalm*

shit happens xD

 

[s_hithappens]

hah right. dont u have physics tomorrow?

 

[SB29597]

hah right. dont u have physics tomorrow?

Nope, I don't take physics- never liked it. Only Bio and Chem. I've got English though

 

[Haider2011]

How on earth did you get 23? Lets hope you screwed up towards the end and not at the beginning of all those mole questions
It was kind of simple, overall

I got 65 % :'(

 

[Haider2011]

is there any chiral center ????

 

[Haider2011]

nh3+h20====== Hno3+h2??????