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AQA - Unit 5 - Energetics, Redox and Inorganic Chemistry

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Reply 140
Original post by Sheldon
hey guys just thought I would post a list of some TM reactions that I made :smile:
If you find them useful I have other notes I made like that for periodicity and some other parts.


Very useful!

I made myself a sheet much like this.. except some of my colours are different :frown:

I have [Cu(H2O)6]^2+ as Blue
[Fe(H2O)6]^2+ as green
[Fe(H2O)6]^3+ as pink (think you had a purpley brown colour wrote for this)
[Co(H2O)6]^2+ as pink
[Cr(H2O)6]^3+ as ruby-red

...How do we know whats right? :frown:
Reply 141
Original post by Sheldon
hey guys just thought I would post a list of some TM reactions that I made :smile:
If you find them useful I have other notes I made like that for periodicity and some other parts.


Hey that is a real great sheet! Thank you
Reply 142
Original post by LimeTree.
Very useful!

I made myself a sheet much like this.. except some of my colours are different :frown:

I have [Cu(H2O)6]^2+ as Blue
[Fe(H2O)6]^2+ as green
[Fe(H2O)6]^3+ as pink (think you had a purpley brown colour wrote for this)
[Co(H2O)6]^2+ as pink
[Cr(H2O)6]^3+ as ruby-red

...How do we know whats right? :frown:


Iron 3+ have never seen that as pink in any book or mark scheme
and all the rest in your list are the same
Reply 143
Original post by Sheldon
Iron 3+ have never seen that as pink in any book or mark scheme
and all the rest in your list are the same


Alright cheers, im checking over all my revision notes now haha
Original post by Sheldon
I don't know why but i find this the easiest part of Chem 5, as its easy marks. For me some of the redox equilibria can be quite hard :frown:


you wrote Fe3+ as pink? ive never seen it as pink before!!!!! =S
Hey people :smile:
Does anyone know the grade boundaries for an A* for the past papers so far ?
Thanks in advance! X
Original post by animal*nature
Hey people :smile:
Does anyone know the grade boundaries for an A* for the past papers so far ?
Thanks in advance! X


http://store.aqa.org.uk/over/stat_pdf/AQA-A-LEVEL-GDE-BOUND-JUNE10.PDF

http://store.aqa.org.uk/over/stat_pdf/AQA-A-LEVEL-GDE-BOUND-JAN11.PDF

It's around 82/100 raw marks for an A* and 73 for an A.
Reply 147
Original post by cheekymon999
you wrote Fe3+ as pink? ive never seen it as pink before!!!!! =S


Where have i?
Original post by Sheldon
Where have i?


sorry! meant to quote the guy you quoted who wrote [Fe(H20)6]3+ as pink...
Heyy does anyone have a sheet of all the equations we're supposed to know for redox questions. thankss :smile:
Reply 150
what should i do in terms of preperation for the synoptic element of the paper?
Reply 151
Original post by kabolin
what should i do in terms of preperation for the synoptic element of the paper?


On the left hand side of the AQA A2 book it says 'Link' I suggest you go back and read through those specific chapters.


Thank you !!! :biggrin: is it the same for jan 10 aswell? X
Reply 153
could anyone please show me a link to all chem5 past papers?
Reply 154
Are these equations from Hydrogen peroxide correct ?

OXIDATION
ACIDIC: h2o2 ------> 2e- + 2H+ + o2
ALKALINE: h2o2 + 2OH- ------> 2e- + 2h20 + o2

REDUCTION
ACIDIC: h2o2 + 2e- + 2H+ ------> 2h2o
ALKALINE: h2o2 + 2e- ------> 2OH-

Thanks
Original post by animal*nature
Thank you !!! :biggrin: is it the same for jan 10 aswell? X


It's always been around 82 for A* and 73 for A. Aim for that or higher. Good luck. :biggrin:

Original post by Assasingh
could anyone please show me a link to all chem5 past papers?


http://www.a-levelchemistry.co.uk/AQA%20Chemistry/AQA%20A2%20Chemistry/Unit%205/Unit%205%20Past%20Papers%20and%20Revision%20Aids/Unit%205%20summary%20home.htm
Reply 156
Why does covalent character in Al2O3 lower the melting point, yet covalent character in ZnSe increases the lattice enthalpy?
Original post by Sheldon
hey guys just thought I would post a list of some TM reactions that I made :smile:
If you find them useful I have other notes I made like that for periodicity and some other parts.


Have you got anything on chapter 14?
[Fe(H2O)6]3+ is pale violet people! not pink...
Original post by cheekymon999
anyone got any decent ways of remembering transition metal colours? :s-smilie: worried about those!

although the january paper seemed to be all transition metals (all of section B except the last question) so i hope that means its all electrode potentials because i love that!!!!!!


Noooo! I hate electrode potentials :afraid:

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