AQA chem module 5...transition metal colours and inorganic ions etc!

I am so confused about what colours and equations i need to know.i looked at the syllabus but still don't understand.does anyone have a big table of the colours and equations?if so could you please post it!thanks

OP

anyone?

With equations, it's a matter of learning trends. Cu is the only transition metal which is a bit of a freak when it comes to certain equations, everything else follows suit. Like, stuff in excess leads to ligan exchance, precipitates are neutral etc

I would like to, but I can't provide a table - sorry :/

Reply 3

yoyoyomo

9

http://www.a-levelchemistry.co.uk/

in the mod 5 bit, go to reactions of inorganic etc whatever it is. go to the notes for the topic and on the last page there is a table. i advise you to copy the table in your notes and then colour in the boxes. when you do that, you can kind of see a pattern, and it doesnt seem so bad!

Reply 4

duke_stix

4

Hi there

i'll just summarise everything for you

you need to know the following reactions of the following transition metal ions:

M2+ ions- Fe, Co, Cu
M3+ ions- Fe, Cr, Al

Reactions with, (and in this order i find is more logical)

Water- to form the hexaqua complexes
Dilute NaOH
Excess NaOH
Air oxidised or not? if so, what is the product?

Dilute NH3
Excess NH3
Air oxidised or not? if so, what is the product?

Na2CO3

HCl

you need to know the following:

COMPLETE equations for reactions of all of the above (thats each ion with each reagent)

Colours of the complexes formed

whether they are Hydrolysis, Ligand Substitution or Redox reactions

and that is mostly it

i have a nice little sheet that college gave us i could add i think:

aqueus_ion_reactions.jpg132.8KB

Reply 5

ggoates

Original post by duke_stix

Hi there

i'll just summarise everything for you

you need to know the following reactions of the following transition metal ions:

M2+ ions- Fe, Co, Cu
M3+ ions- Fe, Cr, Al

Reactions with, (and in this order i find is more logical)

Water- to form the hexaqua complexes
Dilute NaOH
Excess NaOH
Air oxidised or not? if so, what is the product?

Dilute NH3
Excess NH3
Air oxidised or not? if so, what is the product?

Na2CO3

HCl

you need to know the following:

COMPLETE equations for reactions of all of the above (thats each ion with each reagent)

Colours of the complexes formed

whether they are Hydrolysis, Ligand Substitution or Redox reactions

and that is mostly it

i have a nice little sheet that college gave us i could add i think:

thank you! ive been looking for a table like this for ages!! :smile:

AQA chem module 5...transition metal colours and inorganic ions etc!

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