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Author Topic: IG Chemistry Paper 3 discussion  (Read 24516 times)

zara

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Re: IG Chemistry Paper 3 discussion
« Reply #15 on: June 01, 2009, 10:06:41 pm »
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....  :D :D :D

lollzzz....chill out guys!!!
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Offline evilzurg307

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Re: IG Chemistry Paper 3 discussion
« Reply #16 on: June 01, 2009, 10:16:55 pm »
I screwed up mine too!
9 questions instead of ordinary set of 7! The parts i am not sure that they are correct or not are:
1)T element- i wrote potassium as it is more reactive.
2)show that the reaction is exothermic- i added first 2 subtracted the value from the last one
3)test other than indicator to show that acid group is present- left blank
4) last page aluminum stuff - my equation was
Al4C3 + 12 H2O --> 4Al(OH)3 +3CH4

rest every thing was correct except for 2 marks in electrolysis and 1 mark for property of ionic compounds.
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Offline Muho

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Re: IG Chemistry Paper 3 discussion
« Reply #17 on: June 01, 2009, 10:22:23 pm »
Quote from: evilzurg307 on June 01, 2009, 10:16:55 pm
I screwed up mine too!
9 questions instead of ordinary set of 7! The parts i am not sure that they are correct or not are:
1)T element- i wrote potassium as it is more reactive.
2)show that the reaction is exothermic- i added first 2 subtracted the value from the last one
3)test other than indicator to show that acid group is present- left blank
4) last page aluminum stuff - my equation was
Al4C3 + 12 H2O --> 4Al(OH)3 +3CH4

rest every thing was correct except for 2 marks in electrolysis and 1 mark for property of ionic compounds.

number 4 is correct. xD  but anyway i'm not sure, and can't bother myself with this anymore. there's an exam for me tomorrow, english language for edexcel, and i must revise on that. One last chance. Paper 1; use it! good luck everyone *goes off*
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Offline mr3bood

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Re: IG Chemistry Paper 3 discussion
« Reply #18 on: June 01, 2009, 10:23:34 pm »
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...
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Offline X Abdulrahman X

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Re: IG Chemistry Paper 3 discussion
« Reply #19 on: June 01, 2009, 10:27:29 pm »
i wrote for the acid thingy, add drops of an alkali, and if acid is present a reaction will take place
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Offline mr3bood

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Re: IG Chemistry Paper 3 discussion
« Reply #20 on: June 01, 2009, 10:30:22 pm »
what about the chlorophyll question?....the first one where it says *how can you show that this green solution contains chlorophyll*?...and the second one that has 3 marks!...*expain the role of chlorophyll*?...
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Offline susman

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Re: IG Chemistry Paper 3 discussion
« Reply #21 on: June 01, 2009, 10:37:17 pm »
how was the graph on the ammonia?
inverse rigth?
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Offline X Abdulrahman X

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Re: IG Chemistry Paper 3 discussion
« Reply #22 on: June 01, 2009, 10:38:24 pm »
Quote from: susman on June 01, 2009, 10:37:17 pm
how was the graph on the ammonia?
inverse rigth?

yea it starts high and decreases as u go along
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Offline X Abdulrahman X

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Re: IG Chemistry Paper 3 discussion
« Reply #23 on: June 01, 2009, 10:39:57 pm »
Quote from: mr3bood on June 01, 2009, 10:30:22 pm
what about the chlorophyll question?....the first one where it says *how can you show that this green solution contains chlorophyll*?...and the second one that has 3 marks!...*expain the role of chlorophyll*?...

u add iodine it turns black, i wrote stuff like photosynthesis, and gives it its colour, and absorbs light etc, last time i read bout chlorophyll was years ago lol
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When they talk about me they say I be trippin
What they say about me doesn't make me mad 
I think they hatin cause they see me when I'm rollin
Man I can't help it that they really doin bad  =P

Big cars, Big wheels, Big chains, Big pimpin', Big money, Big Dreams ;-)

Offline shafiq_92libra

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Re: IG Chemistry Paper 3 discussion
« Reply #24 on: June 01, 2009, 10:51:43 pm »
Dudes i found chem pretty easy  :D
it wasnt awesome
bt it wasnt bad
i was expecting worse
especially after how easy 2008 papers were
for da chlorophyll i took a guess and wrote you compare da colour of chlorophyll to da colours of the constituents on da chromatography paper
if it is a match then chlorophyll is present
although i dnt expect marx for dat answer
and for da acid 1 i wrote you add a metal and hydrogen gas is given out
ok its june 2nd so i think its okay to post this ryt?
and yeah inverse
and chlorophyll is a catalyst for photosynthesis
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Offline emi

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Re: IG Chemistry Paper 3 discussion
« Reply #25 on: June 01, 2009, 11:55:45 pm »
if you dissolev chlorophyll in ethanol, doesnt its color go away ?
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Offline shafiq_92libra

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Re: IG Chemistry Paper 3 discussion
« Reply #26 on: June 02, 2009, 12:10:43 am »
im not sure if it does lol
all i know is chlorophyll is a green pigment
and dat ethnol removes starch
i think im not even sure about that
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Offline Ukhti-R

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Re: IG Chemistry Paper 3 discussion
« Reply #27 on: June 02, 2009, 12:14:17 am »
yeah I think it dus.... it decolourises it ....i think ..:P
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Offline emi

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Re: IG Chemistry Paper 3 discussion
« Reply #28 on: June 02, 2009, 12:33:23 am »
no it doesn't remove the start ,, i remember in one of the tests we had to learn, one of the steps was to i dono boil or something the leaf in ethanol to dissolve the chlorophyll and it would turn it white ?


so cant that be used as a test to see if chlorophyll is there
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Offline Wahab09

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Re: IG Chemistry Paper 3 discussion
« Reply #29 on: June 02, 2009, 12:42:34 am »
"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..!
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