Qualification > Sciences
Edexcel CHEMISTRY DOUBTS!!!!
Malak:
--- Quote from: ~ Miss Relina ~ on January 23, 2012, 07:01:47 am ---but I didn't see it in old pastpapers actually it is in the Edxecel chemistry blue book
--- End quote ---
Yeah, for some reason it is there and even I thought that we had to know it but then I checked the spec. and they only mention Ka, Kw, Pka, Pkw, pH thats it.
guMnam:
--- Quote from: Ang3l on January 23, 2012, 08:04:03 am ---Yeah, for some reason it is there and even I thought that we had to know it but then I checked the spec. and they only mention Ka, Kw, Pka, Pkw, pH thats it.
--- End quote ---
the point is .. its the same thing.. just opposite .. knowing it is no big deal.
~ Miss Relina ~:
in Jan 2010 last question
why is the splitting pattern for butan1-ol is 36531
from where do we get five splitting :o
The Golden Girl =D:
It's not 36531 ... it's actually 3400 (according to my teacher that is :) ) which is the peak for the OH in an Alcohol ;D
Since it can be Oxidized then it's either primary or secondary Alcohol ,tertiary can NOT be oxidized remember ;)
Draw butanol ,the primary , the secondary versions of it [if you are having trouble doing that let me know I'll draw it bas mikasila for now :P ..u r right I'm lazy ::) :P )
if you look at the spectrum for X in part (b) of the Question. Counting them from the left to right ,they are five splittings.
Splitting one => the one with 6 lines lined up closely to each other
splitting two => the Single long line
splitting THREE => the ones with 5 lines lined up closely to each other
Splitting FOUR => those TWO parallel LONG lines
Splitting FIVE => the three lines , having the middle one the LONGEST among them
CH3CH2CH(OH)CH3
starting from the LHS :
The first CH3 => is a triplet which is the (one with three lines and the middle one the LONGEST among them ;) )
the CH2 => is a Pentate [search for the ones with FIVE lines closely lined up together) ...that's the one for it ;)
the CH => is a Sixtet [search for the ones with SIX lines closely lined up together ]
the OH => the single line ...cuz OH is ALWAYS a single line since it's a singlet By the way ;)
the LAST Ch3=> is a Doublet [ search for the one with ONLY TWO lines ]
I hope I helped (: [jawabt su2aleek ana willa kunt bas 2atfalsaf o.O ]
(gtg go my own way ::) ..cya good luck with tomorrow ;) )
Don't forget to include me in your prayers sis ;D
~ Miss Relina ~:
--- Quote from: The Golden Girl on January 25, 2012, 12:56:40 pm ---It's not 36531 ... it's actually 3400 (according to my teacher that is :) ) which is the peak for the OH in an Alcohol ;D
Since it can be Oxidized then it's either primary or secondary Alcohol ,tertiary can NOT be oxidized remember ;)
Draw butanol ,the primary , the secondary versions of it [if you are having trouble doing that let me know I'll draw it bas mikasila for now :P ..u r right I'm lazy ::) :P )
if you look at the spectrum for X in part (b) of the Question. Counting them from the left to right ,they are five splittings.
Splitting one => the one with 6 lines lined up closely to each other
splitting two => the Single long line
splitting THREE => the ones with 5 lines lined up closely to each other
Splitting FOUR => those TWO parallel LONG lines
Splitting FIVE => the three lines , having the middle one the LONGEST among them
CH3CH2CH(OH)CH3
starting from the LHS :
The first CH3 => is a triplet which is the (one with three lines and the middle one the LONGEST among them ;) )
the CH2 => is a Pentate [search for the ones with FIVE lines closely lined up together) ...that's the one for it ;)
the CH => is a Sixtet [search for the ones with SIX lines closely lined up together ]
the OH => the single line ...cuz OH is ALWAYS a single line since it's a singlet By the way ;)
the LAST Ch3=> is a Doublet [ search for the one with ONLY TWO lines ]
I hope I helped (: [jawabt su2aleek ana willa kunt bas 2atfalsaf o.O ]
(gtg go my own way ::) ..cya good luck with tomorrow ;) )
Don't forget to include me in your prayers sis ;D
--- End quote ---
Thanks alot my sis but what confused me that if you looked at JUNE 2011 last question part (d)(ii)
I was wondering why in spectrum 2 we have septet splitting (that short one and fat too )and it ois not octet
I'll post drawing now as ana nashhhhhhhhhhheeeta geadn ;)
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