OCR A2 CHEMISTRY F324 and F325- 14th and 22nd June 2016- OFFICIAL THREAD

Original post by ToLiveInADream

Okay just did Jan f325 and got 80! However, the last question and the electrode potentials were confusing. Can someone help me understand how to answer question 7d. Here is a link:
http://www.ocr.org.uk/Images/144762-question-paper-unit-f325-01-equilibria-energetics-and-elements.pdf

Smh

Reply 462

Original post by itsConnor_

Anyone tried the Edexcel papers? Printed Jan 2016 Unit 4 and Unit 5. Which are more useful for our spec? :smile:

I find AQA better than edexcel but even then I'd focus on legacy papers more than AQA.

They make me purr.

Original post by AqsaMx

When drawing optical isomers, does it matter you order the groups around the chiral centre???

I don't think it does, as long as the optical isomer you draw of it is essentially a mirror image of the one you drew originally

Omg yes

So simple

So photosynthesis is an endothermic reaction and negative change in entropy. How is the reaction possible?

Reply 467

Original post by thad33

So photosynthesis is an endothermic reaction and negative change in entropy. How is the reaction possible?

Temperature is low enough for reaction to be feasible?

Ignore that, I am daft

Something to do with activation perhaps, but photosynthesis isn't one straightforward, simple reaction, there are numerous, numerous steps in involved so I'm guessing the answer is somewhere in there.

(edited 7 years ago)

Reply 468

Original post by Serine Soul

Temperature is low enough for reaction to be feasible?

Ignore that, I am daft

Something to do with activation perhaps, but photosynthesis isn't one straightforward, simple reaction, there are numerous, numerous steps in involved so I'm guessing the answer is somewhere in there.

Yeah, plants are cool as ****

Reply 469

ToLiveInADream

17

Original post by Serine Soul

Smh

??

Reply 470

rory58824

2

Please let's not talk about plants here, I'm sick of them in biology.

Reply 471

Original post by thad33

Yeah, plants are cool as ****

I'm so happy I'll be studying biochem at uni :biggrin:

Reply 472

AqsaMx

5

Original post by Serine Soul

I don't think it does, as long as the optical isomer you draw of it is essentially a mirror image of the one you drew originally

Okay thanks :smile:

MS doesn't really say anything on it

Reply 473

Original post by ToLiveInADream

??

No 7)d)? :/

Original post by rory58824

Please let's not talk about plants here, I'm sick of them in biology.

IAA is a growth factor which stimulates growth in the shoot and inihibits growth in the root. It is produced in the shoot and root tips and moves across a plant via diffusion

Reply 474

I'm actually so bored of revising chemistry

Reply 475

Original post by thad33

I'm actually so bored of revising chemistry

Same

I'm bored of revising everything

I bet I'll regret saying this later

Reply 476

Original post by Serine Soul

Same

I'm bored of revising everything

I bet I'll regret saying this later

I'm going through papers and skipping like 60% of the questions because there's literally no thought process when answering the questions. I just know I'll get stuck on a question in the real exam and be annoyed that I didn't learn more.

If anyone wants to throw about some tricky questions and upload your solutions and we'll go back and forth with it. Sounds better than answering a question on the electron configuration of Cu²⁺etc

Reply 477