The Student Room Group
Uni students - Complete our survey >>
Uni students - Complete our survey >>
Uni students - Complete our survey >>

A2 transition metals

Describe how you would prepare, from a solution of chromium (III) sulfate :
(a) a solution of a chromium (III) complex
---> should I add EDTA to hace ligand exchange?
(b) A solution containing chromate (VI)
-->is this question testing me on using Zn or SO3- to displace the chromate ion?
(c) a solution containing chromium (II) ions

please help !!!!
thank you very much
Reply 1
Avatar for Borek
Borek
4
Original post by Lamalam
(a) a solution of a chromium (III) complex
---> should I add EDTA to hace ligand exchange?


If it doesn't say what complex then yes, EDTA is one of possible answers.

But technically just dissolving the salt your produce solution of the aqua complex.

(b) A solution containing chromate (VI)
-->is this question testing me on using Zn or SO3- to displace the chromate ion?
(c) a solution containing chromium (II) ions


These are about suggesting oxidizing and reducing agents that would convert Cr(III) to either Cr(II) or Cr(VI).
Reply 2
Avatar for Lamalam
Lamalam
OP
3
Got it!
Thank you:-)

Posted from TSR Mobile
Reply 3
Avatar for Lamalam
Lamalam
OP
3
Original post by Borek
If it doesn't say what complex then yes, EDTA is one of possible answers.

But technically just dissolving the salt your produce solution of the aqua complex.



These are about suggesting oxidizing and reducing agents that would convert Cr(III) to either Cr(II) or Cr(VI).


Got it!
Thank you! :smile:

Posted from TSR Mobile

Quick Reply

Related discussions

Latest

Trending

Trending

Articles for you