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OCR F324-June 2013 Chemistry

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Reply 600
Avatar for otrivine
otrivine
OP
14
Original post by reneetaylor
Ok!

Give 2 possible uses of ms-gc!!


Not revised this, doing it on thursday!

but ill guess, its used for security screening in airports and used for finding any drugs that an athelet may have taken during a sport event?
Original post by otrivine
Not revised this, doing it on thursday!

but ill guess, its used for security screening in airports and used for finding any drugs that an athelet may have taken during a sport event?


You got it right anyway!
Original post by reneetaylor
Yep , you're right!


Sweet! What else can it be used for as I know there is about 5 listed but I can only remember those two things :-/


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Reply 603
Avatar for otrivine
otrivine
OP
14
Original post by reneetaylor
You got it right anyway!


ok :smile:

Suggest conditions/reagents for hydrolysis of polypeptide (3)
Original post by MathsNerd1
Sweet! What else can it be used for as I know there is about 5 listed but I can only remember those two things :-/


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Like otrivine mentioned, it can be used for testing for anabolic steroids in atheletes. It can be used in forensic sampling, by analysing and identifying substances found at a crime scene for example, it ,can be used for space exploration in space probes or analysing pollutants in the environment, checking for the presence of pesticides in food, or assessing the quality of drinking water and waste water
Original post by reneetaylor
Like otrivine mentioned, it can be used for testing for anabolic steroids in atheletes. It can be used in forensic sampling, by analysing and identifying substances found at a crime scene for example, it ,can be used for space exploration in space probes or analysing pollutants in the environment, checking for the presence of pesticides in food, or assessing the quality of drinking water and waste water


Okay, thanks for these, hopefully they'll only ever ask for two uses in the exam.


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Original post by otrivine
ok :smile:

Suggest conditions/reagents for hydrolysis of polypeptide (3)


Acid hydrolysis-
Heated under reflux with an acid for 24 hours,
Possible reagent HCl

Alkaline-
slightly of 100 degrees, and in the presence of an alkali.
Possible reagent NaOH

:confused:
Reply 607
Avatar for otrivine
otrivine
OP
14
Original post by reneetaylor
Acid hydrolysis-
Heated under reflux with an acid for 24 hours,
Possible reagent HCl

Alkaline-
slightly of 100 degrees, and in the presence of an alkali.
Possible reagent NaOH

:confused:


Yes, but for acid also mention the concentration of HCL, which is 6 mol dm-3

my turn :smile:
Original post by MathsNerd1
Okay, thanks for these, hopefully they'll only ever ask for two uses in the exam.


Posted from TSR Mobile

No problem, and yeah, haha :smile:
Original post by otrivine
Yes, but for acid also mention the concentration of HCL, which is 6 mol dm-3

my turn :smile:


Oh okay, will look back at that!

Give 3 methods which will prepare products with only one chiral isomer.
Reply 610
Avatar for otrivine
otrivine
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14
Original post by reneetaylor
Oh okay, will look back at that!

Give 3 methods which will prepare products with only one chiral isomer.


Use biological enzymes (catalysts)

use transition metal ion complexes


chiral synthesis
Original post by otrivine
Use biological enzymes (catalysts)

use transition metal ion complexes


chiral synthesis


Nice one, though don't forget 'pool' in chiral synthesis, as chiral pool synthesis, because chiral pool synthesis improves the efficiency chiral synthesis.
Original post by otrivine
Use biological enzymes (catalysts)

use transition metal ion complexes


chiral synthesis


can you explain each one of these?
Reply 613
Avatar for Better
Better
8
How far is everyone on their Revision here?
Original post by Better
How far is everyone on their Revision here?


I'm on carbon 13-NMR spectroscopy now.

You?
Reply 615
Avatar for otrivine
otrivine
OP
14
Original post by reneetaylor
Nice one, though don't forget 'pool' in chiral synthesis, as chiral pool synthesis, because chiral pool synthesis improves the efficiency chiral synthesis.


true!

describe thalidomide
Reply 616
Avatar for otrivine
otrivine
OP
14
Original post by master y
can you explain each one of these?


In the book, it does not explain each detail?
Original post by otrivine
true!

describe thalidomide


Thalidomide has two chiral isomers, one of which causes birth defects in infants, and the other which cures morning sickeness and colds and flu's
Thalidomide is a chiral compound.
Reply 618
Avatar for Better
Better
8
Original post by reneetaylor
I'm on carbon 13-NMR spectroscopy now.

You?


Haven't start re-revising yet...... -______-

BUT by mark my words by Sunday 21st (next week) I will have Mod 1 Mod 2 and Mod 3 done.

Once I dispose of this Chem 5 and Phys 5 revision.
Reply 619
Avatar for Zzzyax
Zzzyax
2
Original post by otrivine


In the book, it does not explain each detail?


how far have you got with the syllabus?, friend

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