Answer to Question #43302 in Inorganic Chemistry for Anissa
Under strong alkaline conditions, the chromium (III) ions turn into hydroxochromate ions and thus remain in the solution:
Cr3+(aq) + 6OH-(aq) --> [Cr(OH)6]3-(aq)
Iron does not show the amphoteric properties under such conditions, so it can be easily separated from mixture:
Fe3+(aq) + 3OH-(aq) --> Fe(OH)3(solid)
Thank you for your answer.
But I was wondering if I precipitate the iron (III) hydroxide I risk to precipitate the Cr (III) hydroxide too.
I don't want that to happen because I want just to know the amount of Iron.