IG Chemistry Paper 3 discussion

[susman]

Ok guys
i guess 24 hours are up...
oh and mods are not here aswell so when they wake up 24 h will be over...

need answers...specifically of the follofwing question....

1)how would u explain the the sample contained cholorophyll?( iw rote carry another exp and then calculate the distance of the two dots.as pure cholorophyy wil make only one spt and the other one 2-3 so see the distance in which the dots appear and compare)
2) metal T
i wrote formula is t3(po4)2 because it is an insoulble salt(ionic) and gruop 1 metals make soluble salts thus group 2 is there
thus t3po42.,......hope this is correct?

3) the graph of ammnoina
it was inverse right and explanation was that as temp increases the endo one increases...

4) the question in which we had to show that the reacrion is exo...
the answer was like -30 or something...right?

5) the 2 gropus in the lactic one was alkanoic and alcohol...or alcohol or carboxylic?

6) the 2 advantage s of PLA was it can be recycled and it doesnt give fumes right???


need answers of these 6 question.....

plus its 4 am my paper was done 20 hours before
so i think mod can compensate 4 hours.


need answers..
thanks in advance

[horror]

"for the indicator question..i wrote pH meter........i know it's wrong..but at least i wrote something...who knows..i might get it right anyway.......and for the Aluminium question i didnt balance it...so i think i got 1 for a non balanced equation instead of 2..."

dude.. dip a pH meter is 100% correct..!

Its 100% wrong PH meter is an indicator .they said how would you test if the 2 something is acidic without an indicator ....test: add any metal sodium for example ...results: hydrogen gas revolves....-rep me if am wrong and +rep me if am right 

[shafeeqshazana]

youre write...
and i got t3po4.
not t3po42

i used the n = c x V
and since c was constant, n is proportional to v
something like that.
i got t3po4

[guru007]

how was the graph on the ammonia?
inverse rigth?

yea it starts high and decreases as u go along

rate of reaction increases as temp. increases so the graph will be high to low ! and at a certain level constant

Can't we interpret this idea ?

[thukon]

T₃PO₄

[chakrit_m]

the ppr was f9 for me except the phosphate thingy....n maybe i must hv made sum other mistakes but dont realli remember.....neways its OVER n dats wat the reality is...wohoooo...no mor chemistry!!!!

n i guess p1 is nt dat hard...i mean nly selectin answers frm the list given....so u cn *inny meeny myna mo* the answers....lolzz....if ur nt gettin them .......atleast it wont go blank....n who knos ur *inny meeny mynamo* answers r rite....  

lollzzz....chill out guys!!!

It's actually nothing much. JUst look at how many times more the solution and simplify he formulae. My answer T(PO4)3

[Jerry_LA]

yes!!
i wrote T₃PO₄
although i m not  sure

[thukon]

Ok guys
i guess 24 hours are up...
oh and mods are not here aswell so when they wake up 24 h will be over...

need answers...specifically of the follofwing question....

1)how would u explain the the sample contained cholorophyll?( iw rote carry another exp and then calculate the distance of the two dots.as pure cholorophyy wil make only one spt and the other one 2-3 so see the distance in which the dots appear and compare)
2) metal T
i wrote formula is t3(po4)2 because it is an insoulble salt(ionic) and gruop 1 metals make soluble salts thus group 2 is there
thus t3po42.,......hope this is correct?

3) the graph of ammnoina
it was inverse right and explanation was that as temp increases the endo one increases...

4) the question in which we had to show that the reacrion is exo...
the answer was like -30 or something...right?

5) the 2 gropus in the lactic one was alkanoic and alcohol...or alcohol or carboxylic?

6) the 2 advantage s of PLA was it can be recycled and it doesnt give fumes right???


need answers of these 6 question.....

plus its 4 am my paper was done 20 hours before
so i think mod can compensate 4 hours.


need answers..
thanks in advance

For ur 6th one, i did write its recyclable, or biodegradable, but HOW DID U GET THAT IT DOESNT GIVE OFF FUMES??? Where did u get that from?
I wrote thats its easily obtainable, since it comes from corn starch and not petroleum.

[shafeeqshazana]

YEAY! i got that toooo

[aquarian93]

my questions:
1) why do u wash the precipitate (i sed to remove impurities, dunno it its rite)
2) why do u put it in the oven ( i sed to get it in molten state)
3) exo thingi, wt did u guys get?
4) the source of nitrogen?
5) the adv of PLA

my chorophyll and Tphospate thing is rong
is pH meter correct By the way? i wrote that too
the first question was a drawing of chromatography experiment rite?

if 10-15 marks r gone, is it still an A/A*?

jeez, now this is making me depressed

lets discuss now guys, its time already!

[thukon]

What else?? POST SOME QUESTIONS!!!

[ADIN]

man I messed up the first two parts of the first question... for the separation I initially drew a chromatography diagram and then rubbed it out   and then drew fractional distillation. i hope they allow that; it didnt specify that the pigments have the same boiling point

[aquarian93]

my questions:
1) why do u wash the precipitate (i sed to remove impurities, dunno it its rite)
2) why do u put it in the oven ( i sed to get it in molten state)
3) exo thingi, wt did u guys get?
4) the source of nitrogen?
5) the adv of PLA
3) prove its an acid (i said use ph Meter)

my chorophyll and Tphospate thing is rong
the first question was a drawing of chromatography experiment rite?

if 10-15 marks r gone, is it still an A/A*?

jeez, now this is making me depressed

[aquarian93]

ppl cn we pls discuss

[qwert101]

i guessed, said it would contain the p04^3- ion. Should be one of the three marks