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Author Topic: Edexcel CHEMISTRY DOUBTS!!!!  (Read 253940 times)

Offline Ibiza279

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #240 on: May 21, 2010, 09:36:14 am »
Quote from: kim on May 21, 2010, 09:32:45 am
that is adifferent question u have to calculate tyhe volume for dat so u calculate using f2
but for this u r calculating atoms and in the periodic table the masses are of atoms so u directly use dat mass

ohhh, so for mass of atoms, v use the single value of Mr, but for calculating the volume, we take the mass of the molecule, rite ??? :D
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Offline Kim

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #241 on: May 21, 2010, 09:43:12 am »
Quote from: Ibiza279 on May 21, 2010, 09:35:11 am
also, could u tell me the trends in solubility of the group 1 and 2 metals, also the trend relating to the hydration enthalpy and lattice enthalpy and its explanation plz :D

ok solubility of group 2 hydroxides increses down the group
solubility of group 2 sulphates decreases down the group
group 1 metals solubility increases down the group

and yes(for the the above post)

i am sorry i dont know about lattice and hydration enthalpy
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Offline Ibiza279

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #242 on: May 21, 2010, 09:44:47 am »
Quote from: kim on May 21, 2010, 09:43:12 am
ok solubility of group 2 hydroxides increses down the group
solubility of group 2 sulphates decreases down the group
group 1 metals solubility increases down the group

and yes(for the the above post)

i am sorry i dont know about lattice and hydration enthalpy

 so group 1 metals solubility increases down the group for both hydroxides AND sulphates or wat ?
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Offline Kim

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #243 on: May 21, 2010, 09:46:18 am »
Quote from: Ibiza279 on May 21, 2010, 09:44:47 am
so group 1 metals solubility increases down the group for both hydroxides AND sulphates or wat ?
[/quote/]

yes
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After all is said and done, more is said than done.

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Offline Ibiza279

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #244 on: May 21, 2010, 09:59:54 am »
Quote from: kim on May 21, 2010, 09:46:18 am
Quote from: Ibiza279 on May 21, 2010, 09:44:47 am
so group 1 metals solubility increases down the group for both hydroxides AND sulphates or wat ?
[/quote/]

yes



ahh Thanks alot yara, that helped alot, well im off fer Jummah Namaz  ;D cya !
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live life like you'll never die but don't die like you never lived but then again its a saying n i don't believe in saying much so jus forget it . . .

Offline Kim

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #245 on: May 21, 2010, 10:01:27 am »
Quote from: Ibiza279 on May 21, 2010, 09:59:54 am

ahh Thanks alot yara, that helped alot, well im off fer Jummah Namaz  ;D cya !

no problem
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Offline Summer :]

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #246 on: May 21, 2010, 11:59:57 am »
Quote from: vanibharutham on May 20, 2010, 08:11:05 pm
NaCl ionic
BCl3 covalent with only weaker Im forces

BCL3 has covalent bonds - because born is polarising so it pulls the electrons of the anion towards it distorting/causing the bond to be changed..so it becomes partially ionic and covalent though it's properties are mostly covalent
NaCL - is ionic, opposite charges, more attaction, higher boiling points..
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Offline wakemeup

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #247 on: May 21, 2010, 12:05:25 pm »
I'm getting a bit nervous now. Only an hour left. Well, good luck everyone!
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Offline Igcseboy

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #248 on: May 21, 2010, 04:07:31 pm »
So how was the paper!!!!!!!

From my point of view it was easy :):):)

wat abt othersss
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Offline Darth Austrakast

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #249 on: May 21, 2010, 05:36:59 pm »
it was good
though messed up in 1 mcq and not sure about 1 mark............but thank God for no freaky questions!
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Offline Igcseboy

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #250 on: May 21, 2010, 05:42:48 pm »
Quote from: Austrakast on May 21, 2010, 05:36:59 pm
it was good
though messed up in 1 mcq and not sure about 1 mark............but thank God for no freaky questions!


ya Thank God no freaky things :P
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Offline Kim

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #251 on: May 21, 2010, 07:31:18 pm »
Quote from: Igcseboy on May 21, 2010, 05:42:48 pm

ya Thank God no freaky things :P

yay same here i was soo glad wen i saw the paper
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Offline wakemeup

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #252 on: May 21, 2010, 07:42:09 pm »
Quote from: Igcseboy on May 21, 2010, 04:07:31 pm
So how was the paper!!!!!!!

From my point of view it was easy :):):)

wat abt othersss

I'm not really satisfied. I kinda messed up in some really easy q's, like that ppm thing and the peaks of Br2 ions q. It wasn't as bad as it could've been but eh...  :-\
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Offline Uchia

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #253 on: May 21, 2010, 07:51:11 pm »
thank god the paper was easy what about the others
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Offline Kim

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #254 on: May 21, 2010, 07:51:51 pm »
Quote from: wakemeup on May 21, 2010, 07:42:09 pm
I'm not really satisfied. I kinda messed up in some really easy q's, like that ppm thing and the peaks of Br2 ions q. It wasn't as bad as it could've been but eh...  :-\

hey dont worry i am sure u will totally ace it
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After all is said and done, more is said than done.

By the time a man realizes that maybe his father was right, he usually has a son who thinks he’s wrong.

The early bird may get the worm, but the second mouse gets the cheese.
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