Qualification > Sciences
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.:D
need answers..
thanks in advance
horror:
--- Quote from: Wahab09 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..!
--- End quote ---
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 :D
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:
--- Quote from: abdulrahman101 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?
--- End quote ---
yea it starts high and decreases as u go along
--- End quote ---
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???
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