OCR B Salters - F335 Exam - 15 June 2011

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why is there three separate marks for each paper? :s-smilie:

where did you get this from?

It says above ''Grade boundaries 2009-2011 (A/B/C) - that's why there's three marks for each. I got the grade thresholds from the ocr mark schemes, they're usually on the first page of google if you search for them by year. The averages I just worked out, and the boundaries for this year I've predicted.

L.

Reply 521

Paolat

You know for the last question I put the line above the solid :frown:

would I still get marks for labelling the arrows even though the line was in the wrong place (it ses it warms the solution not the surroundings so I thought it was endothermic looooooooool)

Reply 522

bzzz

****ting **** I forgot the sign :frown:

Thoroughly depressed about everything right now.

Reply 523

Legit

I thought that paper was pretty good!

Did anyone get this for NMR?

Reply 524

cleverbong

Original post by Paolat

You know for the last question I put the line above the solid :frown:

would I still get marks for labelling the arrows even though the line was in the wrong place (it ses it warms the solution not the surroundings so I thought it was endothermic looooooooool)

Yes, you do get marks for the two arrows.
One is enthalpy change of hydration and one is enthalpy change of solution.

Reply 525

Cheekytart

S*** paper!

what did people write for the technique for one mark?
i put GLC :biggrin:

Reply 526

cleverbong

Original post by Legit

I thought that paper was pretty good!

Did anyone get this for NMR?

Yes, I do.
The hydrogens are in 3:1 ratio.

Nice drawing by the way.

(edited 12 years ago)

Reply 527

Tetanus

Original post by Legit

I thought that paper was pretty good!

Did anyone get this for NMR?

Yes, but the other way around, was it okay if the single Hydrogen was on the end of the side with 2 Brs? :s-smilie:

Reply 528

Charlotte_93

Original post by Legit

I thought that paper was pretty good!

Did anyone get this for NMR?

I got this!

Reply 529

parallal

Original post by Legit

I thought that paper was pretty good!

Did anyone get this for NMR?

Ha, I didn't.
And yeah, that's what I got. Though I wrote it out instead of drawing it.

Reply 530

Legit

Original post by cleverbong

Yes, I do.
The hydrogens are in 3:1 ratio.

I also wrote GLC for the one your talking about :biggrin:

Reply 531

cleverbong

Original post by Cheekytart

S*** paper!

what did people write for the technique for one mark?
i put GLC :biggrin:

I put gas liquid chromatography.

Reply 532

Reggiee

Original post by Legit

I thought that paper was pretty good!

Did anyone get this for NMR?

i guessed that!
but i dont understand the spectrum
the ppms dont even indicate a H near a Br?
Im really confused?

Reply 533

Kooper

Original post by Legit

I thought that paper was pretty good!

Did anyone get this for NMR?

Yep

Reply 534

zahre

Original post by parallal

That was hard. I put that because the S(total) of the reaction is very high it would need a lot of energy to kick start the reaction. And the fuse would provide a high enough enery/temperature. And then I waffled a bit.

That's wrong but oh well.

I thought the paper was hard. For that question I wrote the same as you but completely made it up. Hope it gets us some marks.The long answer questions were ok though.
What did people write about the polar bonding question? was 5 marks

Reply 535

Kooper

Original post by Tetanus

Yes, but the other way around, was it okay if the single Hydrogen was on the end of the side with 2 Brs? :s-smilie:

Same thing since single bonds can rotate, so yep :biggrin:

Reply 536

Tetanus

Original post by Reggiee

i guessed that!
but i dont understand the spectrum
the ppms dont even indicate a H near a Br?
Im really confused?

You're right, the chemical shifts didn't match up with the regular values, but I'm sure it was okay because the question did not ask for any information about chemical shifts in your answer.. :biggrin:

Reply 537

parallal

Original post by zahre

Carbon is delta positive. Halogen is delta negative. Halogen is bigger so it attracts electrons more strongly.

I can't remember what else I put. What was the whole question?

Reply 538

zahre

Original post by Legit

I thought that paper was pretty good!

Did anyone get this for NMR?

Yeah got exactly that :biggrin:

But the chemical shifts didnt match the ones on the data sheet. Then again it didnt tell us to mention any chemical shifts. Just the splitting pattern and hydrogen environments etc.