ocr a f325 revision thread

Original post by otrivine

Exactly!

you know the legacy papers right , are they the ones on the OCR website?

Yeah as far as I know, that's where I downloaded mine from too :smile:

Reply 1063

Does anybody know how to do spoilers on here? I've answered Gulzar's question but the answer is quite large - I don't want it to take up the thread!
Thank you :smile:

Reply 1064

überambitious_ox

Original post by Funtry

I use Chemguide, Knockhardy and These questions primarily, as well as my own notes.

Yeah I've got those sources down too :smile:

Cool, thank you :smile:

Reply 1065

überambitious_ox

Hey,

Regarding the topic of how non-standard conditions affect electrode potenital values, I think I understand the concept, but does anyone know what the best way is to show understanding in an exam as in the Heinemann I feel the wording on this is slightly weird.

This is on page 189 - the example on concentration.

Thanks in advance :smile:

Reply 1066

Nathan2995

Ughhh retaking this exam after getting an E in January. Started looking at it yesterday and have scheduled around 5-6 days of full on revision/re-learning before the exam. I'm just totally ****ed. I hate F325 with a passion lol, F321 was very basic, I like organic chemistry but I'm really struggling with F325 o.O

I can remember the simple things like [H+]=10^pH, pH= -log10 [H+], Kc = Products/Reactants, Ka = [H+] [A-] / [HA] etc etc but when it comes to the question in the exams I just have no clue and can't apply what I know. I think one of the main problems I have is that because I don't take maths, when rearranging the formula eg. if Ka = [H+] [A-] / [HA] then [H+] = square root of (Ka * [HA] ) I just have to try and remember both instead of understanding why it can be rearranged like that.

No real reason for posting this but oh well, just felt like ranting after having a stressful few hours trying to get to grips with it lol.

Reply 1067

Funtry

15

Original post by zef1995

Yeah as far as I know, that's where I downloaded mine from too :smile:

Spoiler

quoted wrong post, sorry :tongue:

Reply 1068

Original post by Funtry

Spoiler

quoted wrong post, sorry :tongue:

Ah thank you! I will be sure to remove the full stops :P
Thanks again :smile:

Reply 1069

Original post by Gulzar

Sure

I've got it down as 5V2+ + 3MnO4- + 3H2O ------> 5VO3- + 3Mn2+ + 6H+

Spoiler

Reply 1070

ofudge

do we need to know colours of the transition metal ions?
The book says "you dont need to know why they are coloured but be aware of the colours" in the examiners' tip blue box but there is nothing in the spec... :/

Reply 1071

Funtry

15

Original post by ofudge

do we need to know colours of the transition metal ions?
The book says "you dont need to know why they are coloured but be aware of the colours" in the examiners' tip blue box but there is nothing in the spec... :/

Not all, but I've learnt Iron, Cobalt, Copper and Manganese's. Also going to learn Chromium's and Vanadium's as they tend to appear quite a bit then might dedicate some time to learning the last two :tongue:

Reply 1072

Better

8

How many past papers has everyone done, and what are your average scores??

And same for Chem 4 please?

Reply 1073

MedMed12

21

Original post by Better

How many past papers has everyone done, and what are your average scores??

And same for Chem 4 please?

no point comparing yourself to others...as we all work at our own pace and abilities. I've done none since I want to do them well my knowledge is solid as there is only 5 for f325 but I've done the mock (jan paper) and my friends done 2 of them and doing the rest these hols.

Reply 1074

otrivine

Original post by MedMed12

no point comparing yourself to others...as we all work at our own pace and abilities. I've done none since I want to do them well my knowledge is solid as there is only 5 for f325 but I've done the mock (jan paper) and my friends done 2 of them and doing the rest these hols.

I am sure once you did the packs of question you will get a good mark :wink:

They are really excellent :smile:

Reply 1075

MedMed12

21

Original post by otrivine

I am sure once you did the packs of question you will get a good mark :wink:

They are really excellent :smile:

need to start those :P but thank you!

Reply 1076

Better

8

Original post by MedMed12

no point comparing yourself to others...as we all work at our own pace and abilities. I've done none since I want to do them well my knowledge is solid as there is only 5 for f325 but I've done the mock (jan paper) and my friends done 2 of them and doing the rest these hols.

Examinations are competitive events which can be made comparable to any Sporting Eventing where there is an Objective Standard. This is a the very foundation of our modern Western Society, hence it is important to compare yourself to others to ensure you are sufficiently prepared to get the result you desire or rather need to get into University.

It really is not rocket science, anyone who plays sports understands you need to collaborate with others to improve; it is imperative for success. If you don't do this you are truly selling yourself short and will increase your propensity to get a lower grade.

Edit: As a side note, the people who I know at Oxbridge and other Top 5 Universities, all went to schools where they were told to finish all the past papers at least 1-2 weeks before at an A* level. There is a clear reason Private/Grammar Schools do significantly better - they understand how the system works, sorry but I don't agree with you at all.

Has anyone else done all the Past Papers? And what type of scores are you getting. Thanks in advance

(edited 10 years ago)

Reply 1077

MathsNerd1

17

Is anyone able to explain to me how the equilibrium will shift with the change of pressure and concentration? I'm never really sure how to answer the shift changes part of the question but can easily do the equation and any calculating things too as I'm better in the Maths part than the understanding of the actual Chemistry :-/

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Reply 1078

otrivine