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sure ! and what abt if the answer is chromatography ?melting not boiling
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sure ! and what abt if the answer is chromatography ?melting not boiling
difference is they said they were heating the solution not the crystals
hydrated ? how come ? :/I wrote tht too...bt one ov my friends has written 'hydrated' ammonium carbonate....i think tht will account fer two marks i guess!! :/
exactlyThat is exactly the point ........ that they said "further heating " ...and at 400 something degrees,the iron(II) is oxidized
....plus the question said "heating the solution for a few minutes"..i dont think that a few minutes on the bunsen burner would make it reach 480 degrees !!
Plus ,all those who wrote this answer of iron being oxidised into iron(III).......can you answer this question ::::
how are iron (II) sulphate crystals obtained ?
By heating the iron sulphate solution for a few mins until crystallisation ..................
if what theyre saying is right , then we cud've NEVER been able to obtain iron(II) sulphate crystals!!
COME ON PPL !! :/
I wrote chromatography ...and so did most of my friends ....sure ! and what abt if the answer is chromatography ?
i dont rmmbr either :/ikr!
i wrote ammonium carbonate
n ithink its rite cuz its just one compound "W" unlike in other pst pprs u hav like 2 or 3 compounds
also i cant remeber but was there any test for other ions??
Your momshut up..
who is Mohammed yasser? and No it's not REDOXnawaf ana mohammed yasser can we say it is redox
Fairness is actually worth half of the problem.thats right, ya have to mentioning the same volume etc etc
Who said so? We are discussing, why are you mad?it IS ryt, my teacher said so. cn u stop bein da BOSS plzz? u r actin lyk u knw evrythin n da rest of us knw nothin. evrybody makes mistakes. it's not lyk we r perfect!!!
well and silver is less reactive than lead, I think it is right. Ask your teacher he knows better. but I'm pretty sure it's yellow precipitateI wrote rate of reaction decreases coz iodide is less reactive compared to chlorine...
Is tht ryt?!
Hellow, There is single and double dispacment, I have solved from 90's so STFU.What the heck is double displacement.. NEVER i've seen an answer DOUBLE DISPLACEMENT through all the 8 years past papers i went through... its PRECIPITATION!!
It was Easy, the last question answer was :-
1. Place each Corrosion inhibitor in 3 test tube of equal amount.
2. Take 3 steel nails and place them in 3 water bowl.
3. Place each inhibitor in bowl.
5. Leave it undisturbed for 3-4 days in presence of air.
6. After 4 days, Remove the rust which will be Flaky brown solid (FE2OH3.xH2O) and dry them and weigh each of them.
7. The one which has more weigh will be least effective corrosion inhibitor and one with lower weight will most effective corrosion inhibitor.
http://www.scribd.com/doc/93877385/Upload-Paper-4-1?secret_password=7avle997pz1j07r3vxa .............................for paper 4
http://www.scribd.com/doc/93877294/2012-Maths-Paper-2?secret_password=2njbfwspjhnto8n5bivw.......................for paper 2
wht u hav thm on june 11 & 13...............it was may 11 and may 14.......................which country r u from ??!??!????!!!!!!!!!!!!!???????????This is 2012 May/June?!
How come u have these papers when I am like doing the exam on june 11 and june 13??
wat??This is 2012 May/June?!
How come u have these papers when I am like doing the exam on june 11 and june 13??
look bro, I kinda misunderstood you, ok?!Who said so? We are discussing, why are you mad?
whoa dudeHellow, There is single and double dispacment, I have solved from 90's so STFU.
u got no need to apologize sistalook bro, I kinda misunderstood you, ok?!
I mean I lost my temper because you were sort of acting like you knew everything, and the rest of us knew nothing. That's the way I saw it, but in reality, I think you were trying to help the other candidates.
I'm sorry.
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