ocr a f325 revision thread

This exam was solid, The rate of reaction question was harder than usual, the equilibrium question went down by a dodgy factor (1.7x10-3) I got , I found the ph to be the easiest which shows how hard the exam was, didn't get reactions for transition metals judging by posts, but surely you get the marks for the correct reaction. Last question I turned mass into moles that's about it so 1 or 2 / 7 , hopefully get 100ums or a little more / 150 :eek:

Reply 3741

Gulzar

2

Original post by Better

So fxcking annoying its unrreal.

Hey man how did u find it :smile:

Reply 3742

TheRealStevo

Original post by Better

So fxcking annoying its unrreal.

I got 4.99 for ph of buffer :s-smilie:

Reply 3743

taylorshiel

Hardest paper I've ever done

Reply 3744

KD35

15

Hi guys. This paper was an average one I thought.

For the one where there was an increased concentration of H2-

I think the concentration(or was it moles) of H2 will be more
The concentration of I2 will be less
and the conentration of HI will be more

This is because it MINIMISES changes.

For the question on iron and zinc, the first one was a redox, the 2nd was ligand subs.

I didnt get the one where the ferrate ion was produced.

Reply 3745

FailedMyExams

8

Original post by TheRealStevo

This exam was solid, The rate of reaction question was harder than usual, the equilibrium question went down by a dodgy factor (1.7x10-3) I got , I found the ph to be the easiest which shows how hard the exam was, didn't get reactions for transition metals judging by posts, but surely you get the marks for the correct reaction. Last question I turned mass into moles that's about it so 1 or 2 / 7 , hopefully get 100ums or a little more / 150 :eek:

Hoping for 105/150!!!!

I also just did the mass to moles bit lmao, so annoyed :angry:

Reply 3746

Better

8

Original post by PythianLegume

2Al + 6CH3COOH --> 2(CH3COO)3Al + 3H2

Wait Al was 3+ arghhh

Reply 3747

keepontrying

what did everyone get for gibbs!

Reply 3748

Benjy100

5

what was the concentration of the HCl and HClO?

Reply 3749

A-New-Start

Original post by eggfriedrice

I said it would halve but I'm probably wrong ):

The answer is it stays the same

Reply 3750

_HabibaH_

8

Just putting this out there...

Please no one take their life or do something else stupid. 'Tis not worth it. Everyone seems pretty upset, for good reason obv.

Reply 3751

keepontrying

Original post by Benjy100

what was the concentration of the HCl and HClO?

0.14 moldm-3 it was a given in the q

Reply 3752

MathsNerd1

17

Original post by Better

Wait Al was 3+ arghhh

As al is in group 3 that must mean it is 3+ charge

Reply 3753

Better

8

Original post by Gulzar

Hey man how did u find it :smile:

Don't think I got lower than 80, but I was AQA for AS-Level Chemistry so I didn't even know what Water of Crystalissation was, I don't think I lost too many marks on any questions before maybe maximum like 12 but that's pushing it.

So assuming I just dropped 7 marks on the very last question think I'm still above 80.

Reply 3754

Coolina133

7

What is aluminium/ zinc powder even.. Thats what threw me off. There goes my a..

Posted from TSR Mobile

Reply 3755

massi1296

Original post by MathsNerd1

As al is in group 3 that must mean it is 3+ charge

i got the write equations but used al2+ ughhh

Reply 3756

Better

8

Original post by MathsNerd1

As al is in group 3 that must mean it is 3+ charge

Facepalm.

Oh well, did high enough for an A. Not sure about the A*, I will still try to get a high score on Chem 4 next week.

Really pray those boundaries help me out.

Meh, time to get some A*s in C3/C4 and Phys 5 and 4.

Maths and Phys are no where near as confusing as Chemistry. You can pretty much derive everything from the Datasheet.

Reply 3757

Tania2k9

fir the gibbs free energy won't get all the marks because i all the methods correctly but instead of th e-256 they gave us used the standards entropy change of glucose which was -474. :frown:

Reply 3758

A-New-Start

How was it guys? I think revision with you people HELPED! I thought it went pretty well.

Reply 3759

s.shahid

Could some one please do an unofficial markscheme. Because i want to know what I actually got right. By the looks of other people's answer I got most of it wrong. Want to prepare myself for results say so I'm not actually surprised when I get and E.

ocr a f325 revision thread

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