OCR Salters F334 Chemistry of Materials (26/01/2011)

For the nickel-cadmium cell question thingy.

When it asked you the write down the equation when the cell was being recharged.

What did you guys put? Did you put it the opposite way round from how the electrons would flow normally?!?!?!

Also for the polymer repeating unit questions I got a di-ester or something, I had a c=0 connected to a 0 connected to another c=0 in the middle...anyone else get this?




cross links are covalent bonds...at least I hope they are.

The (poly)acrylic acid?
I did this



But didn't show the double bond - abbreviated to COOH....

What did everyone get for the one about mass spec? Like the mass of the peak at 94 and what not?

The (poly)acrylic acid?
I did this



But didn't show the double bond - abbreviated to COOH....

I liked that one Was it 94 or 93?

94/93 : C6 H5/4 OH

And for the other one (211) I did the same molecule minus the OH group (228-211 = 17)

I put C6 H5 O+

No idea if that's right

I put C6 H5 O+

No idea if that's right

Oh nooooo I got that completely wrong. Do you remember how many marks was that worth? And were there any other questions based on that structure?

This is the hardest exam out of all the past papers... This exam didnt even test your knoeldge of the core topics in A2.

I got 24

Yeah seriously f*** this exam. I hope the grade boundaries are in the 50's or something /end of over-exaggerated rant

Did you plug that back into the equation to check rate came out correctly with that value?

I got that at first but realised it must have been 12 after checking.

IN the past papers there were only a few marks on synotic eleents, but today, hmm
First question about 6 marks on e/z isomerism
and another 6 Marks on Polymers with last years, all the stuff we learnt about polymers never even came up apart from a condensation reaction for 2 marks.

And then the questions were so vauge, like the question after the rate equation, didn't know what it was asking.

If it was so symnotic heavy, I would actualy revise some of last years stuff.

What did people put down for ( i think) why the proportion of reactants used was small. I just said because if they were high then it would be zero order ;S

Were OCR smoking crack through their eyeballs when they wrote this ****? What the **** was all this paper about? As if all the synoptic crap like E/Z Isomerism, IR Spectroscopy and cross linkages wasn't enough, they then twist all of the A2 course content into vague, impossible and non-related rubbish. I am seriously pissed off at OCR for writing such a crap paper, which we are all now going to have to pay to resit, what a surprise. I am genuinely shocked that they can write papers as crap, vague and unrelated as this. Did they actually read this paper when they'd finished and think they'd done a good job?

Anyway yeah completely screwed up the paper, I really don't think I knew the answer to 85% of the questions. The first question was just ridiculous - it was on What's in a Medicine. Why do they question us on molecules that we haven't studied? I'm pretty sure that we were supposed to assume that molecule would just do the same thing as a phenol, even though they added in double carbon bonds etc. I've looked in the textbook and the reactions of phenols gets about a quarter of a page in writing - no diagrams or anything. Then when the rest of What's in a Med topic came up (reactions of esters, carboxylic acids) it was woefully vague and massively unapparent. The other topics, Steel Story, Materials Revolution, and Thread of Life were just focused around completely unrelated things - they didn't test us on the core course content. Materials revolution was basically all synoptic with that cross links crap and Thread of Life was that DNA/mRNA thing and I have genuinely never even covered that and I have an excellent chemistry teacher.

Out of ten I would give this paper minus infinity.

Moi aussi! Sad Mechanics times Thank god it'll be over by tomorrow (actually, today.. )
I'm aiming for a D in M1