AQA CHEM4 and CHEM5 revision thread 2016

Original post by Roadrunner55

need help remembering transition metals !!

Same! My teacher counted that there are 49 equations to memorise AND all of their colours AND AQA like to ask stretch-and-challenge questions on them IN THE EXAM. CHEM5 is very scary. Hopefully, we'll get a nice paper.

How's everyone doing on structure determination? (H nmr, C nmr, etc.)

Reply 3

Original post by peterpotatoes

How's everyone doing on structure determination? (H nmr, C nmr, etc.)

This is by far, my least favourite part of Unit 4.

Reply 4

Original post by Anon_98

This is by far, my least favourite part of Unit 4.

This was for me too until recently. Whilst still difficult at times, with enough practice i finally got the hang of it! You just really need to take it step by step and, with C nmr, take every bond into account. That is to say always be aware of what 'different environments' really means

Reply 5

Original post by peterpotatoes

This was for me too until recently. Whilst still difficult at times, with enough practice i finally got the hang of it! You just really need to take it step by step and, with C nmr, take every bond into account. That is to say always be aware of what 'different environments' really means

Yeah, I suppose once I properly start revising that unit I'll be fairly alright.- Lots of practice is exactly what I'll do.. (Once I have finished the entirety of unit 5 that is.. (wahay)) + I also agree with your last point.

Thank you v much for the reassurance + advice. :'3

Reply 6

Original post by Anon_98

Yeah, I suppose once I properly start revising that unit I'll be fairly alright.- Lots of practice is exactly what I'll do.. (Once I have finished the entirety of unit 5 that is.. (wahay)) + I also agree with your last point.

Thank you v much for the reassurance + advice. :'3

You're very welcome! I think unit 4 is actually gonna be easier than my unit 2 retake on the 10th to be honest - we need to work together to beat AQA at their own game > :biggrin:

I've got a few other exams before unit 4 so i'm prioritising them first - CHEM5 is one of my last so revision is a little behind on that unit ;D

Reply 7

Original post by peterpotatoes

You're very welcome! I think unit 4 is actually gonna be easier than my unit 2 retake on the 10th to be honest - we need to work together to beat AQA at their own game > :biggrin:

I've got a few other exams before unit 4 so i'm prioritising them first - CHEM5 is one of my last so revision is a little behind on that unit ;D

Ah I'm doing the retake too - do let me know what you thought of it when it finally comes round aha! (': + absolutely. :biggrin:

That's really great. - In terms of difficulty, I find Unit 5 much easier than Unit 4. What other subjects do you do? :smile:

Reply 8

Original post by Anon_98

Ah I'm doing the retake too - do let me know what you thought of it when it finally comes round aha! (': + absolutely. :biggrin:

That's really great. - In terms of difficulty, I find Unit 5 much easier than Unit 4. What other subjects do you do? :smile:

You find unit 5 easier? I can't understand that at all :biggrin:

I'm doing biology & psychology both AQA; what else are you doing?

Reply 9

Roadrunner55

3

Original post by peterpotatoes

You find unit 5 easier? I can't understand that at all :biggrin:

I'm doing biology & psychology both AQA; what else are you doing?

Yh chem 5 is easier, unit 4 is so long. Whos got good notes/websites resources for nmr (structure determination)

Reply 10

Original post by Roadrunner55

Yh chem 5 is easier, unit 4 is so long. Whos got good notes/websites resources for nmr (structure determination)

The best website for me was chemrevise. Here's a link to simplified notes on structure determination:

https://chemrevise.files.wordpress.com/2014/04/mod-4-revision-guide-11-spectroscopy.pdf

I hope that opens. But as I said earlier in the thread, the best way to become good at this topic is practise. If you're really stuck, maybe check the mark scheme for a question first and work backwards to understand how you might arrive at that answer.

Hope this helps!

Reply 11

thenextchemist

21

Do we have to know how to do this:
It came up in the June 2005 chem5 aqa paper
I don't think it's in our spec but just wanted to double check with u guys

When aqueous sodium thiosulphate is added to solid silver bromide a reaction occurs and a colourless solution is formed.

(i) Identify the silver-containing species present in the colourless solution.

Posted from TSR Mobile

Reply 12

Original post by Bloom77

Do we have to know how to do this:
It came up in the June 2005 chem5 aqa paper
I don't think it's in our spec but just wanted to double check with u guys

When aqueous sodium thiosulphate is added to solid silver bromide a reaction occurs and a colourless solution is formed.

(i) Identify the silver-containing species present in the colourless solution.

Posted from TSR Mobile

the silver-containing species should be silver thiosulfate - Na3[Ag(S2O3)2] - this is a stretch-and-challenge question on metal chemistry, and a similar question was asked on the Jun 2013 paper. We do not need to know silver chemistry anymore, but they may ask something similar using Cobalt, chromium or any other metal named on our specification

(edited 7 years ago)

Reply 13

Original post by peterpotatoes

You find unit 5 easier? I can't understand that at all :biggrin:

I'm doing biology & psychology both AQA; what else are you doing?

Haha, yeah- It might just be bc I absolutely love Transition metals though!

Ah cool, I'm also doing Biology (AQA too) + Maths. :smile:

Reply 14

Fibsy

9

Could someone explain the answer to question 1 c ii for me please? The answer is +256 by the calculation 121 + 79 -(-56)
But i got +144 by the calculation 121 + 79 - 56

Waaaah #unit5chemistryfeels

Reply 15

Original post by Anon_98

Haha, yeah- It might just be bc I absolutely love Transition metals though!

Ah cool, I'm also doing Biology (AQA too) + Maths. :smile:

Please explain to me how on earth you love transition metals! Genuinely i feel like if you could help me see how i can like that topic i might actually be able to handle unit 5!

How're you on biology? D'you prefer BIOL4 or BIOL5? And good luck in maths! I did AS physics last year which is basically M1 and it was a complete trainwreck

(edited 7 years ago)

Reply 16

Engineerrookie

2

After that EMPA don't you think they will be nice?

Reply 17