OCR Chemistry A F324 Rings, Polymers and Analysis Tue 19 June 2012

For A-Level, I think so I think there was a question on the specimen paper about comparing the reactivity of benzene, phenol and cyclohexene with bromine and you seem to have hit the marking points that were on there for the first and third compounds.

I imagine the reason why benzene undergoes substitution has something to do with its stability and this being better preserved by a substitution rather than an addition, but that's beyond A-Level as far as I know.

Hey, just a quick question,I was wondering, you know with d2o, say you had a molecule with 2 oh groups, would you need two molecules of d2o, or would both hydrogens replace the 2 ds, so you get h2o??


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My chemistry teacher spent the whole year warning us to resit everything from AS and to work really hard to get as high as we could in F324, claiming that F325 was 'extremely hard' and could 'bring down your grade significantly'. Personally, I found F324 much harder, and much less interesting

Hey just wanted to ask for the spltting of a H1 spectrum, we only need to use the n + 1 rule? Dont know if anyones done them but was doing the questions from the red OCR book and they said its unlikely we need to know it but just want to check

Am I correct in thinking that only phenol undergoes reactions with NaOH and Na, and not alchohol?

You asking if there are any other rules we need to know? NO

Got some questions for you all as part of your revision :

1a. What type of reaction is making proteins? [1]
1b. How many isomers are possible from making proteins from two amino acids [1]

2a. What is the reagent for the acid hydrolysis of proteins? Also give its concentration, how it is used and how long it is used for [4]
2b How do you decide how many water molecules are needed for the acid hydrolysis of proteins? [1]
2c. Give the general formula of the two amino acids produced from the acid hydrolysis of NH2CH2CONHCHCH3COOH [2]
2d. Why are positive ions present in the products of the acid hydrolysis of proteins? [1]

3a For the alkaline hydrolysis of proteins, what reagent is needed? [1]
3b. What temperature is needed? [1]
3c Give the general formula of the two amino acids produced from the alkaline hydrolysis of NH2CH2CONHCHCH3COOH [2]

In total [14]

hey, how are people revising for this exam? got my notes infront of me but nothings going in so wondering if anybody had any tips?

1a) Condensation
b) 4
2a)HCl, 6moldm-3, aqueous, 24 hours
b) How many amide bonds there are?
d) The products act as a base, so accept protons, forming positive ions.

3a) Naoh
b) 100c

Missed out a few because im lazy, but answers would be great

Best way to revise for this paper is to just write all the reactions down in module 1 and 2. I did this, then go over them a couple hours later, just keep doing this and they will stick. Then for module 3 just past papers. Do the examples, its better then reading the book over and over again. good luck

Does deuterium substitute the OH group on carboxyllic acids? what about phenols?