Fe(III) in solution- violet or yellow?

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  1. shanban's Avatar
    1 13-06-2012  14:18
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    Fe(III) in solution- violet or yellow?
    I'm a little confused as to what the colour of [Fe(H20)6]3+ is...my textbook says it's pale violet but then the CGP revision guide says it's yellow?
  2. lamalas600's Avatar
    2 13-06-2012  14:52
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    Re: Fe(III) in solution- violet or yellow?
    Purple/Yellow/Brown mines says, however it gives off brown ppt soo...
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  3. charco's Avatar
    3 13-06-2012  14:56
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    Re: Fe(III) in solution- violet or yellow?
    (Original post by shanban)
    I'm a little confused as to what the colour of [Fe(H20)6]3+ is...my textbook says it's pale violet but then the CGP revision guide says it's yellow?
    I believe it's purple when pure, but the Fe(III) hexaaqua ion hydrolyses rapidly to produce a quantity of Fe(OH)3, which is brown, so a yellowish colouration is usually seen in aqueous solution.
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