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

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Reply 3340

cr7alwayz

For the last question I think I got 17

Reply 3341

Vannzzoo

Original post by mosheezie

Piss easy FULL UMS FOR ME! My whole college said it was easy af, you guys stop stressing!
Grade boundaries
A* -90
A - 85
Everything below mehh......

lol don't be stupid, 85 for an A?? Lololol nah

Reply 3342

k.russell

Original post by NervousBoy

Anyone get 2.9x10-2 for the Kc value of the order's question because it said apportriate significant figures and standard form?

Same answer as you, it actually said 2 s.f. standard form though (doesn't matter cos you did it anyway lol) the one where it said appropriate was Kc questions I'm pretty sure

Reply 3343

CaoimheMee

Original post by k.russell

Slightly different method, but the same answer! Confident in that one because I did check it twice and and I've done quite a lot of those questions ( I used the value of Kw at 60'C)

thank youuuu I know there's two ways of doing it!

Reply 3344

Kittykatmai

I didn't finish....missed out Q7 and 8 completely. I feel so annoyed rn it's unbelievable 😩😓

Reply 3345

DrAdrenaline

Original post by mosheezie

Piss easy FULL UMS FOR ME! My whole college said it was easy af, you guys stop stressing!
Grade boundaries
A* -90
A - 85
Everything below mehh......

Yeah, agree it was quite easy but stop being obtuse! :smile:

Reply 3346

bj1

Original post by ToLiveInADream

F321 - yellow precipiate formed from Ag + I

Sigh. Bet the resitters were laughing at that one and the linear one.

It was 79 for an A last year, one of the highest it's ever been. This will certainly not be higher than that. Harder than this years F324 tbh.

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(edited 7 years ago)

Reply 3347

Docjae

Original post by screwedmofo

i got 11.72, what did u get for the ph of the buffer of HNO2 i got 2.12?

I got 2.12 as well. Not sure it's correct though :/

Reply 3348

saira123x

Why was H+ not a catalyst!? I said it doesn't speed up the rate of reaction and is not reformed ?

Reply 3349

fghj1

Original post by k.russell

Not 100% on this, but I imagine the equilibrium lying to the left is related to the attractions between water and I2 not being strong therefore it is not favourable for for I2 to be dissolved.. The equilibrium position is probably caused by the lack of polarity and hence solubility, rather than the solubility being determined by the equilibrium position ygm?

I definitely agree that the polarity argument makes sense and is right, unless this is a throw back to electronegativity from F321 etc I don't really see how its relevant when the whole question is about equilibriums and how they shift etc. I just assumed it was as obvious as it seemed as it was only 1 mark

Reply 3350

LThomas694

Does anyone think that there was a lot more AS stuff than normal in both F324 and F325 this year? Also do people think that that paper was harder than 2014 and 2015?

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Reply 3351

Michaelj99

I got 2.12 for one question and then following that I got 3.43 i think? pH im guessing

Reply 3352

k.russell

So I actually thought the sneakiest question on the whole damn paper was the electron configuration of Cu+, it's not like other configurations, because coppers normal config. is ...3d104s1 so Cu+ is ...3d10 did anyone put the same?

Reply 3353

CookieMonster786

Original post by DazBoy

I got 2.12 as well. Not sure it's correct though :/

Omg thought I was the only one...thank god

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Reply 3354

uk_shahj

Original post by alu4days

Hey were you supposed to use 100cm3 or 120cm3?
Because if its diluted you should take the total volume of everything?

100cm3 because it was made up to 100cm3. atleast that's how i interpreted it

Reply 3355

alu4days

Original post by LThomas694

Does anyone think that there was a lot more AS stuff than normal in both F324 and F325 this year? Also do people think that that paper was harder than 2014 and 2015?

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Definitely harder than 2015

Reply 3356

safhassan

Original post by mosheezie

Piss easy FULL UMS FOR ME! My whole college said it was easy af, you guys stop stressing!
Grade boundaries
A* -90
A - 85
Everything below mehh......

Well good for you. Of course your whole college got it easy where you attend '' Eton''.

Reply 3357

Serine Soul

When I was doing it, it seemed hard.
Now that I'm out, it looks easy :/

Hopefully 85 is an A*

Lol at F321 in the paper tho

Reply 3358

screwedmofo

[QUOTE="CaoimheMee;66007408"]thank youuuu I know there's two ways of doing it![/QUOTE
err, i used the poh method, and got 11.72 but not sure if the temperature wud effect the ph