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Chemistry and Physics some Keypoints/Notepoints (onDemandOnly) !! :)

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xhizors

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AsSalamalaikum wr wb
How are you ppl!

I hope my last thread was helpful to you guys, and if it really helped you than please pray for me!!

I belief if i help you guys Allah will help me 10x !!

I created this thread to share some Notes or Keypoints!
but as syllabus is too much to cover and i have my personal life too
I changed the strategy

you feel helpless in any topic, in any point in any matter in any subject(just including Phy, Chem and Maths A2only)
you post it and i will reply you from my best !
rules:
in a post no more than 1 topic should be asked
(because that overdose me )
you can make multiple posts for different topics u feel problem in!

and No doubts of PP should be asked here!
you can use other threads created by XPF member or knowitall10
and tag me if you like too and i will reply inshallah!

This thread is only to make or clear concepts!
See this thread as: ask a topic and u shall receive :)

Post the topic you are worst and inshallah by Allah's help i'll try to make it easy for you!

JazakAllah!
PPlease pray for me That Allah helps me in getting a world Distinctions in all of the papers Ameen Ya Rabal Alameen!
 
knowitall10

knowitall10

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xhizors said:
AsSalamalaikum wr wb
How are you ppl!

I hope my last thread was helpful to you guys, and if it really helped you than please pray for me!!

I belief if i help you guys Allah will help me 10x !!

I created this thread to share some Notes or Keypoints!
but as syllabus is too much to cover and i have my personal life too
I changed the strategy

you feel helpless in any topic, in any point in any matter in any subject(just including Phy, Chem and Maths A2only)
you post it and i will reply you from my best !
rules:
in a post no more than 1 topic should be asked
(because that overdose me )
you can make multiple posts for different topics u feel problem in!

and No doubts of PP should be asked here!
you can use other threads created by XPF member or knowitall10
and tag me if you like too and i will reply inshallah!

This thread is only to make or clear concepts!
See this thread as: ask a topic and u shall receive :)

Post the topic you are worst and inshallah by Allah's help i'll try to make it easy for you!

JazakAllah!
PPlease pray for me That Allah helps me in getting a world Distinctions in all of the papers Ameen Ya Rabal Alameen!
Click to expand...
Wa iyyak Brother!!:)
What's with the strict rules?:p
I'll have to open a new tab;)
and...one question... is it ok to joke around here:censored:??
 
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xhizors

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PhyZac said:
How to deduce a structure of a molecule using NMR?
Click to expand...
Bismillah,
MashaAllah a BIG question
Ok so i assume you know about Peaks
we can deduce the structure by high resolution NMR where the peaks are splits apart
Peaks Splitting Depends on(highResolution NMR):
the proton environment in the neighbour (lol not in my neighbour)
the one which carbon is attatched to specifically
the pattern of splitting is: number of H atoms in neighbour +1
so assume fragment of CH3 is detected and it is attatched to Ch2 and on other side with ch2
so the split is breaking in 6let(6peaks)
Condition:
if Ch3 is attatched to most electronegative environment like Ch3-OH
then ch3 peak wont be splitting
ok so quest:
if its like ch3-ch2-OH how many peaks if so and how'll they split

now by neighbourhood u can get an idea of Hydrogens etc
Nmr Peaks x-axis is Chemical Shifts Values
so after judging what could possibly be around from peaks u pick a data booklet and match your prediction by Chemical shift values

Hope you get the idea!
 
iKhaled

iKhaled

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is this thread for past paper questions that we have doubts in too or only for topic questions ?
 
knowitall10

knowitall10

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Somebody, please explain quantitative electrolysis in detail. like including that qeirdo charge formula and all:/ I h8 ths:/
 
iKhaled

iKhaled

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ohh..would of been better if all included in one thread because past paper questions explained will help ppl who read it as a revision too i see
 
knowitall10

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iKhaled said:
ohh..would of been better if all included in one thread because past paper questions explained will help ppl who read it as a revision too i see
Click to expand...
But brither, some aren't even done with the course and some have exams...we'll discuss pp's when we know everyone is willing to pay attention.. i mean i had to repeat a single concept literally 10 times before p5 remember? the same question was asked over and over andover and over and over again.;)
 
littlecloud11

littlecloud11

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xhizors said:
Bismillah,
MashaAllah a BIG question
Ok so i assume you know about Peaks
we can deduce the structure by high resolution NMR where the peaks are splits apart
Peaks Splitting Depends on:
the proton environment in the neighbour (lol not in my neighbour)
the one which carbon is attatched to specifically
the pattern of splitting is: number of H atoms in neighbour +1
so assume fragment of CH3 is detected and it is attatched to Ch2 and on other side with ch2
so the split is breaking in 6let(6peaks)
Condition:
if Ch3 is attatched to most electronegative environment like Ch3-OH
then ch3 peak wont be splitting
ok so quest:
if its like ch3-ch2-OH how many peaks if so and how'll they split

now by neighbourhood u can get an idea of Hydrogens etc
Nmr Peaks x-axis is Chemical Shifts Values
so after judging what could possibly be around from peaks u pick a data booklet and match your prediction by Chemical shift values

Hope you get the idea!
Click to expand...

Apologies for the intervention but If CH3 is attached to 2 -CH2 groups on either side, It'll be a pentate not split into 6 peaks.
 
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xhizors

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littlecloud11 said:
Apologies for the intervention but If CH3 is attached to 2 -CH2 groups on either side, It'll be a pentate not split into 6 peaks.
Click to expand...
Thanks for the feedback
well Peaks will be doubled in low resolution NMR they never split in Low resolution NMR
they only split in highResolutuion NMR! and will split into 6 peaks
jzk
 
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