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Author Topic: Edexcel CHEMISTRY DOUBTS!!!!  (Read 254042 times)

Offline Igcseboy

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #180 on: May 20, 2010, 06:57:54 pm »
Quote from: kim on May 20, 2010, 06:14:07 pm
well i am just doin papers
try doin sum old papers
and am going to revise everything in my notes and txtbk
have alot of time in the morn as well so will do revision then as well


where r u frm??? which skuul????
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Offline Kim

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #181 on: May 20, 2010, 06:59:05 pm »
Quote from: Igcseboy on May 20, 2010, 06:57:54 pm

where r u frm??? which skuul????

why????
i am living in dubai
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Offline Igcseboy

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #182 on: May 20, 2010, 07:03:31 pm »
just askin am frm KSA...... i have paper like 3:30 pm so am realxed for now ... wat abt u???
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Offline Kim

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #183 on: May 20, 2010, 07:05:29 pm »
Quote from: Igcseboy on May 20, 2010, 07:03:31 pm
just askin am frm KSA...... i have paper like 3:30 pm so am realxed for now ... wat abt u???

oooh i have at 3.30 as well
but u r an hour behind my time i think
so it will be at ur 2.30
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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.

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Offline Igcseboy

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #184 on: May 20, 2010, 07:14:36 pm »
Quote from: kim on May 20, 2010, 07:05:29 pm
oooh i have at 3.30 as well
but u r an hour behind my time i think
so it will be at ur 2.30

yup!!!!


hey do we have to do the alcohol and aloalkane organic chemistry??
and wat abt CFCs and ozone?? :S:S
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Offline Kim

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #185 on: May 20, 2010, 07:17:18 pm »
Quote from: Igcseboy on May 20, 2010, 07:14:36 pm
yup!!!!


hey do we have to do the alcohol and aloalkane organic chemistry??
and wat abt CFCs and ozone?? :S:S


well i learned the whole of unit and unit 2
well cfc and ozone usually is for unit 2
i think u just need to know the side effect of polymers and their advantages
but just read the others as well
better be safe then sorry
so where do u live in ksa?
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Offline Kim

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #186 on: May 20, 2010, 07:20:01 pm »
i have another question
jan 2008 unit 1 q 4bi
how do u get 2e ?
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Offline Igcseboy

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #187 on: May 20, 2010, 07:29:29 pm »
Quote from: kim on May 20, 2010, 07:20:01 pm
i have another question
jan 2008 unit 1 q 4bi
how do u get 2e ?


as it form Cl2 molecules so 2e as "Cl2" ... get it???

am live in riyadh well am basically frm Pakistan... settled here...

By the way redox reactions are not in Unit 1 :S:S :D
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Offline Kim

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #188 on: May 20, 2010, 07:31:34 pm »
Quote from: Igcseboy on May 20, 2010, 07:29:29 pm

as it form Cl2 molecules so 2e as "Cl2" ... get it???

am live in riyadh well am basically frm Pakistan... settled here...

By the way redox reactions are not in Unit 1 :S:S :D

really??thanks
oooh cool
then u shud come join us in the pakistanis hea group if u havent already been there
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By the time a man realizes that maybe his father was right, he usually has a son who thinks he’s wrong.

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Offline Igcseboy

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #189 on: May 20, 2010, 07:36:26 pm »
Quote from: kim on May 20, 2010, 07:31:34 pm
really??thanks
oooh cool
then u shud come join us in the pakistanis hea group if u havent already been there


sure i will ..... so u also from Pakistan ?? which city??

By the way a question which has the higher melting point Neon or Krypton??

 and why does melting point increases from sodium to aluminium??
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Offline Kim

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #190 on: May 20, 2010, 07:40:07 pm »
Quote from: Igcseboy on May 20, 2010, 07:36:26 pm

sure i will ..... so u also from Pakistan ?? which city??

By the way a question which has the higher melting point Neon or Krypton??

 and why does melting point increases from sodium to aluminium??

yup i m from lahore
krypton has the higher boiling point
although they both have dispersion forces krypton has more electrons so the dispersion forces are stronger in krypton

and the mp increases from sodium to aluminium because across a period the radius decreases
and the nuclear charge increases so the outer electron experiences more attraction thus is harder to remove
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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.

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Offline Igcseboy

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #191 on: May 20, 2010, 07:43:01 pm »
Quote from: kim on May 20, 2010, 07:40:07 pm
yup i m from lahore
krypton has the higher boiling point
although they both have dispersion forces krypton has more electrons so the dispersion forces are stronger in krypton

and the mp increases from sodium to aluminium because across a period the radius decreases
and the nuclear charge increases so the outer electron experiences more attraction thus is harder to remove

ahan i am frm Karachi

but shud it not be Neon as it has less electron shells so it is strongly attracted to the nucleus:S:S
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Offline Kim

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #192 on: May 20, 2010, 07:46:20 pm »
Quote from: Igcseboy on May 20, 2010, 07:43:01 pm
ahan i am frm Karachi

but shud it not be Neon as it has less electron shells so it is strongly attracted to the nucleus:S:S

cool nnice place

i think its krypton because they said boiling point and wenever it is boiling point u have to describe the intermolecular forces
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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.

Offline Kim

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #193 on: May 20, 2010, 07:47:58 pm »
if u want u can check out the ms for jan 2004 q 1b it has a similar question
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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.

Offline vanibharutham

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #194 on: May 20, 2010, 07:49:34 pm »
boiling poitn shouldnt be confused with Ioinisation energy

neon has a higher ionization energy becasuse force of attractio between nucleus and electrons is much more...but krypton has a much higher boiling point because of the IM forces involved - it has many more and stronger vdw forces than neon and so higher boiling point
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