Cssa Trials... (1 Viewer)

[ishq]

of course, i was amazed how fast this thread had developed. lol

by anywayz how can u get 3XX for the molar heat of comb, i got 139X.XXX and that seem close to the results from the books, so i was hoping it was right as i got 29.99kj/g so times that by the molar mass for ethanol.,

well correct me if i am wrong, hope i am now,

so how did u do the question 15 of MC, i cant get any of the ansers, plz enlighten me

Its 2707
for Q 15

I think
U add the vol of Nitrogen and steam dont u?

 

[~ ReNcH ~]

of course, i was amazed how fast this thread had developed. lol

by anywayz how can u get 3XX for the molar heat of comb, i got 139X.XXX and that seem close to the results from the books, so i was hoping it was right as i got 29.99kj/g so times that by the molar mass for ethanol.,

well correct me if i am wrong, hope i am now,

so how did u do the question 15 of MC, i cant get any of the ansers, plz enlighten me

Look at my working in a previous post.

 

[richz]

Its 2707
for Q 15

I think
U add the vol of Nitrogen and steam dont u?

yeah thats what most of us are sayiny in this thread

 

[Pointy Ears]

so how did u do the question 15 of MC, i cant get any of the ansers, plz enlighten me

Yea, that question stuffed me too. I just guessed C cos it seemed reasonable.

 

[king_of_boredom]

Yea, that question stuffed me too. I just guessed C cos it seemed reasonable.

same here, that threw me off. i kept gettin answers between B and C, so i too guessed C

 

[Haku]

lol, i just guessed D, cause i only got 1 other D in the MC section so i thought there would be more Ds...

but i also thought 2XXX was more reasonable!!!

 

[king_of_boredom]

And guys, for the ph question, i used C1V1=C2V2

Ie, the concentration to begin with was 0.1 and the volume was 0.1 and the volume to end with was one litre... so you get the concentration, then neg log it, and u get 2.

Thats what i did anyway.

yeah i got 1.92..... so i just assumed 2.

 

[ishq]

What did you get for the neutralisation one?

pH increases by 1 for every factor of 10 in volume...
So it went from 100ml to 1000ml
pH 1 to pH 2...

 

[Haku]

yeah i got 1.92..... so i just assumed 2.

yea i got that too, i think its right.

just wondering how many Ds did u choose for MC, cause i choose 1 D and the last one i choose D as well cause there were only 1 D, and so i fuked up...so less Ds....hahaha

 

[~ ReNcH ~]

yeah i got 1.92..... so i just assumed 2.

In getting 1.92 you probably used 900mL as the new volume, but 900mL is added to the exisiting 100mL giving 1000mL in total.

 

[Haku]

yea, thats right, well i got 2

but for the oyaster i got 60....which round of to 6...so yea

so its cool, so could someone enlighten me on how many Ds they got all togther beside the last Question BS

 

[jennylim]

the oysters were ridiculous. i got 60g of oysters all up, assumed that each oyster was 10g and went for C.

that said, it wasn't entirely bad...there were a few questions i sort-of knew (the most annoying, since it just won't come but it's tantalisingly on the edge of your memory) but managed to get a fair stab at and some fairly annoying ones, but mainly ok. does anyone else think 3 hours is too long?? i can't remember ever being so bored!!!

 

[Pointy Ears]

Yea, 3 hours is pretty long, but I dont mind Its better than not having enough eg. like in english exams.

 

[velox]

That was from a pervious CSSA paper...either 2002 or 2003.

yeh that was in my half yearly

 

[currysauce]

that oyster question was so irrelevant, i get the pH one now - should be 2

oh well you can't win em all aye

 

[Numero Uno]

yeh 3 hours is quite alot of time
finished within 2 hours and wrote extra bs in my exam paper

 

[queenie]

Did anyone make up a name for that aussie scientist question?

 

[fantasy27]

Did anyone make up a name for that aussie scientist question?

no, we actually got a handout from conq. chem on Burhan G, a scientist at Qenos, Botany!

 

[king_of_boredom]

Did anyone make up a name for that aussie scientist question?

hell no, i actually got a sheet on Dr David Proctor [he monitors combustion reactions].

 

[Ogden_Nash]

Hmm, what about the dry cell question in the multiple choice? Not very handy if you've studied the lead-acid cell.
I was certain the syllabus only requires you to know one of the two, and not one in particular. Ah well...