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Author Topic: Edexcel CHEMISTRY DOUBTS!!!!  (Read 268895 times)

Offline Malak

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #1140 on: May 22, 2011, 08:29:10 pm »
Quote from: NightHawkerr on May 22, 2011, 08:05:54 pm
If the temperature increases what happens to the peaks( and the broadness) in the infrared spectroscopy? I had this question in my mock exam today, didn't know how to answer it. ;/
Is this for A2?
Because I haven't read or seen anything like temperature and IR :S
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Offline NightHawkerr

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #1141 on: May 22, 2011, 08:44:45 pm »
Quote from: ang3l on May 22, 2011, 08:29:10 pm
Is this for A2?
Because I haven't read or seen anything like temperature and IR :S

I dont know, I just saw this in my AS Chem Mock exam today and i got a little worried since I didnt do a question related to IR Spectroscopy for Unit1/Unit3b, Maybe it's comin; for Unit 2  ???
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Offline Malak

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #1142 on: May 22, 2011, 09:02:52 pm »
Quote from: NightHawkerr on May 22, 2011, 08:44:45 pm
I dont know, I just saw this in my AS Chem Mock exam today and i got a little worried since I didnt do a question related to IR Spectroscopy for Unit1/Unit3b, Maybe it's comin; for Unit 2  ???
IR is in unit 2 and i have studied it but haven't seen anything regarding temperature affecting peaks or something
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Offline NightHawkerr

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #1143 on: May 22, 2011, 09:16:39 pm »
Quote from: ang3l on May 22, 2011, 09:02:52 pm
IR is in unit 2 and i have studied it but haven't seen anything regarding temperature affecting peaks or something

Okie good, i hope it doesn't come! Thanks.  :)
Good luck for your chem Unit 1 and 3 tomorrow!
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Offline Malak

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #1144 on: May 22, 2011, 09:20:36 pm »
Quote from: NightHawkerr on May 22, 2011, 09:16:39 pm
Okie good, i hope it doesn't come! Thanks.  :)
Good luck for your chem Unit 1 and 3 tomorrow!
Thanks :) Good Luck to u too

By the way i only have 3b :D
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Offline NidZ- Hero

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #1145 on: May 22, 2011, 10:27:22 pm »

(a) Compound X is a white crystalline solid that dissolves easily in water to form a
clear, colourless solution. X contains one cation and one anion. Complete the table
below.
(5)
Test Observation Inference
(i) Warm solid X with dilute
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A gas was evolved which
turned damp red litmus
paper blue.
Ammonia is formed so
the ammonium ion is
present.
(ii) Add aqueous barium
chloride to a solution of X.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
X contains either
sulfite (sulfate(IV))
or
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
or
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(iii) Add dilute hydrochloric
acid to the result of
test (ii).
A gas was evolved which
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sulfite (sulfate(IV))
confirmed.
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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #1146 on: May 23, 2011, 06:18:11 am »
Quote from: Nidzzz on May 22, 2011, 10:27:22 pm
(a) Compound X is a white crystalline solid that dissolves easily in water to form a
clear, colourless solution. X contains one cation and one anion. Complete the table
below.
(5)
Test Observation Inference
(i) Warm solid X with dilute
. . . . . .Sodium hydroxide solution  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A gas was evolved which
turned damp red litmus
paper blue.
Ammonia is formed so
the ammonium ion is
present.
(ii) Add aqueous barium
chloride to a solution of X.
. . . . . . . . . . . . . . whit ppt  . . . . . . .
X contains either
sulfite (sulfate(IV))
or
. . . . . . . . . . . . . . .Sulphate (6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
or
. . . . . . . . . . . . . . . . . . .Carbonate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(iii) Add dilute hydrochloric
acid to the result of
test (ii).
A gas was evolved which
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . that turned potassium dichromate from orange to green . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sulfite (sulfate(IV))
confirmed.

Good Luck Everyone :)
« Last Edit: May 23, 2011, 02:20:10 pm by ~ The Golden Girl ~ »
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Offline NightHawkerr

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #1147 on: May 23, 2011, 10:18:09 am »
Quote from: ang3l on May 22, 2011, 09:20:36 pm
Thanks :) Good Luck to u too

By the way i only have 3b :D


Ahh luckyyy,I just got over with my 3b, Unit 1 is in 2 hours  :-[
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Offline guMnam

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #1148 on: May 23, 2011, 04:40:53 pm »
i hope every one had a nice exam :)
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Offline Malak

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #1149 on: May 23, 2011, 04:43:00 pm »
Quote from: guMnam on May 23, 2011, 04:40:53 pm
i hope every one had a nice exam :)
mine was good :)
Now have to prepare for unit 3
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Offline guMnam

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #1150 on: May 23, 2011, 04:44:51 pm »
unit 3 :S ^
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Offline Malak

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #1151 on: May 23, 2011, 04:45:39 pm »
Quote from: guMnam on May 23, 2011, 04:44:51 pm
unit 3 :S ^
Sorry i meant unit 2 lol..:P
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Offline guMnam

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #1152 on: May 23, 2011, 04:50:23 pm »
Quote from: ang3l on May 23, 2011, 04:45:39 pm
Sorry i meant unit 2 lol..:P
haha.. chem has really messed up ur head :P

lol.. i have to do bio 6 then 2 and then think abt chem unit 2 .. -.-  :-\
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Offline Malak

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #1153 on: May 23, 2011, 04:53:55 pm »
Quote from: guMnam on May 23, 2011, 04:50:23 pm
haha.. chem has really messed up ur head :P

lol.. i have to do bio 6 then 2 and then think abt chem unit 2 .. -.-  :-\
Lol..i guess so :P
Oh Good luck..! I have math c2 and them chem 2 so yeah :P but still better situation then urs  ::)
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Offline guMnam

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Re: Edexcel CHEMISTRY DOUBTS!!!!
« Reply #1154 on: May 23, 2011, 04:57:44 pm »
Quote from: ang3l on May 23, 2011, 04:53:55 pm
Lol..i guess so :P
Oh Good luck..! I have math c2 and them chem 2 so yeah :P but still better situation then urs  ::)
u sig reminds me of a member named hope =\ *memories*
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