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Qualification => GCE AS & A2 Level => Queries => Topic started by: heemvi on October 27, 2009, 05:06:08 am

Title: chemistry practical exams on 29th october
Post by: heemvi on October 27, 2009, 05:06:08 am: can u giv me some tips n little things i nid 2 knw 4 the xm (on titrations salt analysis n rate of reactions)...
(our school didnt alow us 2 do much practicals since laboratories were under cnstructions)
:-[
am little bit cnfusd...
Title: Re: chemistry practical exams on 29th october
Post by: 123 on October 27, 2009, 07:37:26 am: Hi heema
which paper u taking for chemistry practical on 29 oct? is it CIE?
I know wat its like =P

go here:
https://studentforums.biz/index.php/topic,4454.0.html
(https://studentforums.biz/index.php/topic,4454.0.html)
get that AS booklet..i think its ment for teachers but the appendix in last pages help in someway

http://www.knockhardy.org.uk/sci.htm (http://www.knockhardy.org.uk/sci.htm)
this site has few notes on errors, moles and rate of reaction...
hav a look at past pap.....do the calculations part with some value of tit. vol. mostly its bout 24-26.5 ml
Title: Re: chemistry practical exams on 29th october
Post by: Raima on October 27, 2009, 10:43:41 am: does anyone hav any idea whats cming in the practical of chemistry on 29th????
Title: Re: chemistry practical exams on 29th october
Post by: MaNi_DaDuDe on October 27, 2009, 12:03:04 pm: Quote from: Raima on October 27, 2009, 10:43:41 am
does anyone hav any idea whats cming in the practical of chemistry on 29th????

Nope.

Obviously there will be 3 questions.

One on titration
Second on the identification of cations/anions
Third: SURPRISE :o

gl

I too have my exam a day after tomorrow.
Title: Re: chemistry practical exams on 29th october
Post by: pravin_5 on October 28, 2009, 05:36:39 pm: Quote from: Raima on October 27, 2009, 10:43:41 am
does anyone hav any idea whats cming in the practical of chemistry on 29th????
im not really sure of my sources but i heard that the second question is about dehydration of salts(refer may/jun 2002)
and the third question is about qualitative analysis of course but something to do with organic chemistry........no reaction kinetics or thermo chemistry.......this is for paper 33!!!! good luck
Title: Re: chemistry practical exams on 29th october
Post by: polaroidsoflove on October 28, 2009, 06:02:14 pm: I've heard rumors that a crucible is involved. In paper 33
Title: Re: chemistry practical exams on 29th october
Post by: ability on October 28, 2009, 06:45:42 pm: Any rumor or guess about paper 31 ?
Title: Re: chemistry practical exams on 29th october
Post by: musicfreak on October 28, 2009, 07:30:17 pm: wth! organic chem tests!
shittttt
thats all the tolens reagent and all that innit... .and test for alcohol.... i think with N2 whnn h2 is liberated...
crap thats hard!
Title: Re: chemistry practical exams on 29th october
Post by: ChrisWeiYuan on October 28, 2009, 08:05:42 pm: can you please tell in more details?
three questions or two?
1st part would be?
2nd part/
and third part?
Title: Re: chemistry practical exams on 29th october
Post by: MaNi_DaDuDe on October 28, 2009, 09:07:51 pm: I do not believe that we will have anything to do with organic compounds in our AS exam tomorrow. :S
Title: Re: chemistry practical exams on 29th october
Post by: zawir_91 on October 28, 2009, 11:10:05 pm: i strongly encouraged u to read organic compounds because ethanol is present as a reagent in the exam lab.

if it's not for QA it can be asked in titration, so u should note the colour changes.

and about the crucibles, yes they are present on the exam lab for paper 33.

there's no purpose of providing a crucible (which is rarely used) if it don't have any function in the questions.
Title: Re: chemistry practical exams on 29th october
Post by: MaNi_DaDuDe on October 28, 2009, 11:14:53 pm: but is it in the instructions for the reagents to be used for the practical?
Title: Re: chemistry practical exams on 29th october
Post by: pravin_5 on October 29, 2009, 07:07:25 am: Quote from: MaNi_DaDuDe on October 28, 2009, 11:14:53 pm
but is it in the instructions for the reagents to be used for the practical?
Deleted by Admin. Please wait 24h.
Title: Re: chemistry practical exams on 29th october
Post by: musicfreak on October 29, 2009, 08:44:53 am: awsum.. i got all of em rite... pracs was alhumdullilah reli gud :D :D :D :D
Title: Re: chemistry practical exams on 29th october
Post by: MaNi_DaDuDe on October 29, 2009, 10:16:27 am: Thanks a lot for posting Pravin, but I had already finished my practical by then.

Alhamdulillah my paper went really well.

Good Luck for the next exams guys! ;D
Title: Re: chemistry practical exams on 29th october
Post by: heemvi on October 29, 2009, 03:33:22 pm: wel practical ws olryt
we got nly 2 questions
no titrations
Thanks u....
bt i made a little mistk
i 4got to put -ve sign in 1st question
Title: Re: chemistry practical exams on 29th october
Post by: Sorceres on October 29, 2009, 03:57:43 pm: Quote from: heema on October 29, 2009, 03:33:22 pm
wel practical ws olryt
we got nly 2 questions
no titrations
Thanks u....
bt i made a little mistk
i 4got to put -ve sign in 1st question

no titration?? but mine had 3 question and i had titration ???
u mean we're not doing the same paper? 9701/33?
Title: Re: chemistry practical exams on 29th october
Post by: osmosis on October 29, 2009, 04:19:05 pm: mine was paper 33....yes, there's 3 questions...
Title: Re: chemistry practical exams on 29th october
Post by: polaroidsoflove on October 29, 2009, 05:30:46 pm: I had 3 questions aswell.
The first was titration and heating.
Second was identification of ions.
The last was a bit tricky. Did you guys get lead as the cation present in FA9?
Title: Re: chemistry practical exams on 29th october
Post by: Lana Wolf on October 29, 2009, 06:23:34 pm: Quote from: polaroidsoflove on October 29, 2009, 05:30:46 pm
I had 3 questions aswell.
The first was titration and heating.
Second was identification of ions.
The last was a bit tricky. Did you guys get lead as the cation present in FA9?

ya....i got lead....good to know...*sigh*..i was worried about tht........
Title: Re: chemistry practical exams on 29th october
Post by: Sorceres on October 30, 2009, 01:51:14 am: Quote from: polaroidsoflove on October 29, 2009, 05:30:46 pm
I had 3 questions aswell.
The first was titration and heating.
Second was identification of ions.
The last was a bit tricky. Did you guys get lead as the cation present in FA9?

yeah i got Pb2+ as well. By the way what's the chemical process? i put oxidation but some of my friends say esterification?
Title: Re: chemistry practical exams on 29th october
Post by: heemvi on October 30, 2009, 05:26:04 am: infct i do paper 31!!
ova here its divided in2 2 parts....
those who r competin 4 scholarships do paper 31 n those who rnt do paper 32
Title: Re: chemistry practical exams on 29th october
Post by: osmosis on October 30, 2009, 06:54:12 pm: yes! I got Pb2+ too...... :)
Title: Re: chemistry practical exams on 29th october
Post by: wunderkind on October 31, 2009, 04:16:35 am: hey,
what were the reagents you used for Q2 ?

did anyone else feel a time constraint during this exam ?

thanks,
Wunderkind
Title: Re: chemistry practical exams on 29th october
Post by: Sorceres on October 31, 2009, 04:21:34 am: Quote from: wunderkind on October 31, 2009, 04:16:35 am
hey,
what were the reagents you used for Q2 ?

did anyone else feel a time constraint during this exam ?

thanks,
Wunderkind

i used AgNO3 and dilute HCl.. hbu?
i think this time the experiment is quite okay..
i had bout 25mins left.. but during my trials i really didn't have time to finish..
Title: Re: chemistry practical exams on 29th october
Post by: wunderkind on October 31, 2009, 04:35:28 am: i used PbNO3 and dil H2SO4 ... didnt really get the expected results for that one.
lol maybe time was a problem for me b'cuz i re-tried this one hoping to get wat i expected

everyone seems to have done well, so the percentile should be high this time around.
Title: Re: chemistry practical exams on 29th october
Post by: Lana Wolf on November 02, 2009, 09:13:46 am: Quote from: Sorceres on October 30, 2009, 01:51:14 am
yeah i got Pb2+ as well. By the way what's the chemical process? i put oxidation but some of my friends say esterification?

its oxidation...i got that confirmed..... :)