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OCR B Salters Chemistry 2014 - F332

Hey guys!

There aren't many people doing our board, so I thought I'd create a thread where we can be really collaborative in revising, and make predictions on topics, provide mark scheme answers and ask questions etc.

Here are a few good revision sources I have come across from previous threads and personal experience:

http://www.chemgym.net/
http://www.docbrown.info/page19/saltersASchemistry.htm
http://www.chemguide.co.uk/
http://4college.co.uk/as/index.php
http://getrevising.co.uk/resources?q=OCR+Salters&go=
http://www.scribd.com/collections/3614045/Chemistry-revision

Advance notice Qs:
https://intranet.psc.ac.uk/chemistry/documents/adv_notice_wsheet_jun14ii.pdf
https://intranet.psc.ac.uk/chemistry/documents/answers_adv_notice_wsh_2014ii.pdf
http://www.hartismere.com/Subjects/Science/Chemistry/6thFormChemistry/Module2F332


Few documents attached below. Please note, they are not all mine. The only one I made is the production of the halogens.

Modules: Elements from the sea, atmosphere and polymer revolution

Past Papers & Mark Schemes: http://www.ocr.org.uk/qualifications...ers-h035-h435/
Specification: http://www.ocr.org.uk/images/73469-specification.pdf
Advance Notice: http://www.ocr.org.uk/Images/165494-unit-f332-advance-notice-june-2014.pdf

June 2013 F332 Paper attached


Good luck!

:biggrin: :cool:


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(edited 9 years ago)

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Reply 1
Can someone please sum up which mechanisms we need to know according to the spec, and just a brief explanation?
Reply 2
Oh and what reactions do we need to know? Do we need to know their reaction conditions too?
Original post by eddy1296
Can someone please wwwwwwwwwsum up which mechanisms we need to know according to the spec, and just a brief explanation?


Alkane (UV+Halogen) -> Halogen alkane + halide

Alkene (halogen + Room temp) -> Dihaloalkane

Alkene (HBr + Room temp) -> Bromoalkane

Alkene (H2 + platinum) -> Alkane

Halogenalkane (Aqueous sodium hydroxide + reflux) -> Na + (Halide) + alcohol

Halogenalkane (NH3 + sealed tube) -> Amine + Halogen acid (H + Halide)

Alkene -> Alcohol (not to sure about the condition's and catalysis but i think its Phosphoric acid + SO2 @ 300°C for 60 min)

and if you know any more please tell me.

:smile:
Reply 4
Original post by Totally1337
Alkane (UV+Halogen) -> Halogen alkane + halide

Alkene (halogen + Room temp) -> Dihaloalkane

Alkene (HBr + Room temp) -> Bromoalkane

Alkene (H2 + platinum) -> Alkane

Halogenalkane (Aqueous sodium hydroxide + reflux) -> Na + (Halide) + alcohol

Halogenalkane (NH3 + sealed tube) -> Amine + Halogen acid (H + Halide)

Alkene -> Alcohol (not to sure about the condition's and catalysis but i think its Phosphoric acid + SO2 @ 300°C for 60 min)

and if you know any more please tell me.

:smile:


I think we also need to know the reactions of primary/secondary/tertiary alcohols when oxidised with acidified potassium dichromate. I've seen it in a couple of past papers. Could someone check if these are the correct reactions and conditions? And is it possible for secondary alcohols to make carboxylic acids under reflux conditions?

[O] = oxidising agent

Primary alcohol + [O] -> Aldehyde + H2O (under distillation conditions)
Further oxidation / reflux of primary alcohols -> carboxylic acid

Secondary alcohol + [O] -> Ketone + H2O (under distillation conditions)
Potassium dichromate turns from orange to dark green
Tertiary alcohols cannot be oxidised
Original post by Petulia
I think we also need to know the reactions of primary/secondary/tertiary alcohols when oxidised with acidified potassium dichromate. I've seen it in a couple of past papers. Could someone check if these are the correct reactions and conditions? And is it possible for secondary alcohols to make carboxylic acids under reflux conditions?

[O] = oxidising agent

Primary alcohol + [O] -> Aldehyde + H2O (under distillation conditions)
Further oxidation / reflux of primary alcohols -> carboxylic acid

Secondary alcohol + [O] -> Ketone + H2O (under distillation conditions)
Potassium dichromate turns from orange to dark green
Tertiary alcohols cannot be oxidised


Yes this is right, you use potassium dichromate with sulfuric acid and heat under reflux :smile: Distillation to get aldehyde, but leave it to get carboxylic acid.
Original post by Totally1337
Alkane (UV+Halogen) -> Halogen alkane + halide

Alkene (halogen + Room temp) -> Dihaloalkane

Alkene (HBr + Room temp) -> Bromoalkane

Alkene (H2 + platinum) -> Alkane

Halogenalkane (Aqueous sodium hydroxide + reflux) -> Na + (Halide) + alcohol

Halogenalkane (NH3 + sealed tube) -> Amine + Halogen acid (H + Halide)

Alkene -> Alcohol (not to sure about the condition's and catalysis but i think its Phosphoric acid + SO2 @ 300°C for 60 min)

and if you know any more please tell me.

:smile:


Dehydration of an alcohol to an alkene :smile: I think conditions are concentrated H2SO4 and heat under reflux, and we have to know about how to purify and "organic liquid product" too.
Reply 7
Do you guys agree fluorine isnt soluble in water because it reacts vigorously with water rather than form a solution?


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Original post by BrokenS0ulz
Dehydration of an alcohol to an alkene :smile: I think conditions are concentrated H2SO4 and heat under reflux, and we have to know about how to purify and "organic liquid product" too.


:redface:
Could tell me the steps of purifying the products please. XD
Original post by Fifa97
Do you guys agree fluorine isnt soluble in water because it reacts vigorously with water rather than form a solution?


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Yup
Reply 10
Original post by Totally1337
Yup


Ok thanks. Has a question on hydrated ions ever come up before?


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Original post by Totally1337
:redface:
Could tell me the steps of purifying the products please. XD


uuuhm I don't know it perfectly but I think it's something like:

Shake with sodium hydrogencarbonate to remove acidic impurities.
Then I think you run off the product layer and mix it with anhydrous sodium sulfate, and then run the product off again.

The proper thing is on the syllabus, I think I've missed out a bit of detail!
Reply 12
Original post by BrokenS0ulz
uuuhm I don't know it perfectly but I think it's something like:

Shake with sodium hydrogencarbonate to remove acidic impurities.
Then I think you run off the product layer and mix it with anhydrous sodium sulfate, and then run the product off again.

The proper thing is on the syllabus, I think I've missed out a bit of detail!


Yh I think after that is a distillation and as you said the sodium hydrogencarbonate is to remove acid impurities and the anhydrous sodium sulfate is to remove water.


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Original post by Fifa97
Yh I think after that is a distillation and as you said the sodium hydrogencarbonate is to remove acid impurities and the anhydrous sodium sulfate is to remove water.


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Purification is just the removal of any additional impurities by setting up a distillation apparatus.
Add a few anti-bumping granules to the distillation flask containing the dried solution / impure liquid, and then heat with a bunsen burner.
Collect the pure liquid in a separate flask (under the condenser tube)
Do you guys have the practical activity booklet? All of this is explained in ES6.3 (Making a halogenoalkane)
Reply 15
Original post by Petulia
Do you guys have the practical activity booklet? All of this is explained in ES6.3 (Making a halogenoalkane)


Here you go !
Reply 16
Original post by nk96
Here you go !


Thanks alot. I'm curious if they will add in a sneaky density related question in the exam if this was to come up. I saw them do this in the past.


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Does anyone have any good notes on the pre release or could tell me where to start because it's just scaring me :confused: thanks!
Original post by Turtlefushsia
Does anyone have any good notes on the pre release or could tell me where to start because it's just scaring me :confused: thanks!


Learn the functional groups on the Advanced notice. My teacher said to annotate all of the molecules and highlight the ketones / aldehydes etc. The questions will be related to alcohols and the polymer revolution. Also look out for which ones are primary, secondary and tertiary.
(edited 9 years ago)
Reply 19
Original post by Turtlefushsia
Does anyone have any good notes on the pre release or could tell me where to start because it's just scaring me :confused: thanks!


http://www.thestudentroom.co.uk/showthread.php?t=2616076 this thread had good links to worksheet questions


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