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Author Topic: Chemistry P3 7/6/2010  (Read 24326 times)

Offline $H00t!N& $t@r

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Re: Chemistry P3 7/6/2010
« Reply #45 on: June 04, 2010, 02:14:23 pm »
Quote from: J.Darren on June 04, 2010, 02:01:29 pm
C17H33 has two fewer hydrogen atoms compared to C17H35, we can deduce that C17H33 is an alkene straightaway ...

how does that prove its an alkene? isnt it supposed to be C17H34 for it to be an alkene?
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elemis

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Re: Chemistry P3 7/6/2010
« Reply #46 on: June 04, 2010, 02:16:56 pm »
Here :

q8 c        (iii)

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Offline $H00t!N& $t@r

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Re: Chemistry P3 7/6/2010
« Reply #47 on: June 04, 2010, 02:22:01 pm »
umm why are you posting the question paper?
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elemis

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Re: Chemistry P3 7/6/2010
« Reply #48 on: June 04, 2010, 02:24:09 pm »
Quote from: Shooting Star on June 04, 2010, 02:22:01 pm
umm why are you posting the question paper?

Calling in backup ;)
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Offline J.Darren

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Re: Chemistry P3 7/6/2010
« Reply #49 on: June 04, 2010, 02:24:57 pm »
Quote from: Ari Ben Canaan on June 04, 2010, 02:09:37 pm
How does that prove anything ?
It was merely a guess, I haven't a clue about that question as well when I was doing the PP, I wrote that in the script and it turns out to be correct ...
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Offline $H00t!N& $t@r

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Re: Chemistry P3 7/6/2010
« Reply #50 on: June 04, 2010, 02:25:56 pm »
ahh i see  :D

ill be here... waiting for the answer...  :)
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"If A equals success, then the formula is:
A=X+Y+Z, X is work. Y is play. Z is keep your mouth shut"- Albert Einstein

nid404

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Re: Chemistry P3 7/6/2010
« Reply #51 on: June 04, 2010, 02:52:07 pm »
One is saturated, the other is not.

Use bromine water test.

with fat1 it will decolorise
with fat 2 no change
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elemis

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Re: Chemistry P3 7/6/2010
« Reply #52 on: June 04, 2010, 02:54:08 pm »
Quote from: nid404 on June 04, 2010, 02:52:07 pm
One is saturated, the other is not.

Use bromine water test.

with fat1 it will decolorise
with fat 2 no change

HOW do you determine which one will decolorise bromine water ? Obviously it will be one with C=C bonds, but HOW do you determine which one it is ?
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nid404

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Re: Chemistry P3 7/6/2010
« Reply #53 on: June 04, 2010, 03:03:22 pm »
the one with less no of hydrogens is unsaturated...obv much

So in this case it's fat 1
« Last Edit: June 04, 2010, 03:05:28 pm by nid404 »
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Offline jellybeans

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Re: Chemistry P3 7/6/2010
« Reply #54 on: June 04, 2010, 03:14:37 pm »
Hiiiii :D
i've got major problems with drawing monomers and polymers D:
HELP PLEASEEE, THANKS ;D ;D ;D
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nid404

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Re: Chemistry P3 7/6/2010
« Reply #55 on: June 04, 2010, 03:19:55 pm »
check the files attached  :)
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Offline jellybeans

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Re: Chemistry P3 7/6/2010
« Reply #56 on: June 04, 2010, 03:24:31 pm »
Quote from: nid404 on June 04, 2010, 03:19:55 pm
check the files attached  :)

haha, okayyy thank you :) :) then whut about the silver particles? do we have to add them on the monomer/polymer?
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nid404

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Re: Chemistry P3 7/6/2010
« Reply #57 on: June 04, 2010, 03:25:48 pm »
Nope. Polymer=polypropene...clearly mentioned... ;)
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Offline jellybeans

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Re: Chemistry P3 7/6/2010
« Reply #58 on: June 04, 2010, 03:28:16 pm »
Quote from: nid404 on June 04, 2010, 03:25:48 pm
Nope. Polymer=polypropene...clearly mentioned... ;)

okayyy :D thanks.
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Offline J.Darren

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Re: Chemistry P3 7/6/2010
« Reply #59 on: June 04, 2010, 03:29:10 pm »
Quote from: jellybeans on June 04, 2010, 03:24:31 pm
haha, okayyy thank you :) :) then whut about the silver particles? do we have to add them on the monomer/polymer?
http://img85.imageshack.us/img85/5738/monomerandpolymer.png
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