What do I need to know about coloured ions????? Watch

Badges: 9
Report Thread starter 1 year ago
Hey, im currently revising A2 inorganic, specifically transition metals and wanted to know. How much do i need to remember about the colours? Im using the CGP revision guide and there is so much, do i need to know the colour changes in a substitution reactions, or just the colours of the single ions, or the colour changes when vanadium ions are reduced or even their reactions with OH-, NH3 and Na2CO3?? Thanks, hope this makes sense
Badges: 22
Report 1 year ago
If you're doing AQA, I'm not too sure because it's not on the new spec but there have been previous questions on colours on the old spec.

I'd revise some of the more common ion colours just to be sure though.

Fe(II) is easy because it's always a green ppt
Fe(III) is always your typical brown ppt.
Cu(II) is generally blue but is a very deep blue with ammonia ligands.
Al(III) is always white but colourless with OH- in excess.

You only need to know about these 4 ions in the spec so I assume you only need to know about their colours? If you write these up on flashcards, it'll be ez to remember.

Edit: for AQA, you also need to know Vanadium colours.

Quick Reply

Attached files
Write a reply...
new posts
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.


University open days

  • Bournemouth University
    Clearing Open Day Undergraduate
    Wed, 31 Jul '19
  • Staffordshire University
    Postgraduate open event - Stoke-on-Trent campus Postgraduate
    Wed, 7 Aug '19
  • University of Derby
    Foundation Open Event Further education
    Wed, 7 Aug '19

Are you tempted to change your firm university choice on A-level results day?

Yes, I'll try and go to a uni higher up the league tables (158)
Yes, there is a uni that I prefer and I'll fit in better (77)
No I am happy with my course choice (529)
I'm using Clearing when I have my exam results (127)

Watched Threads

View All