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K3RhCl6

Posted: Tue Mar 26, 2024 7:36 am
by Volpotto
Hi everyone,

I am new to the Forum and I need your help.
I have some potassium hexachlororodate K3RhCl6 that I no longer use and would like to separate pure rhodium from it.
How can I do?
Please note that I work in a fairly well equipped chemical lab and am used to handling chemicals and using general lab equipments.
Thank you very much for your attention.

Re: K3RhCl6

Posted: Tue Mar 26, 2024 7:48 am
by ChenBeier
You can try electrolysis or reduction with strong reducer, like SnCl2 or v
Ascorbic acid.

Re: K3RhCl6

Posted: Tue Mar 26, 2024 8:09 am
by Volpotto
Thank you ChenBeier.

I had also thought electrolysis but I have no idea about the right​​ process conditions (e.g. type of electrodes, electric potential, concentration)...

Re: K3RhCl6

Posted: Tue Mar 26, 2024 8:45 am
by ChenBeier
I would react the salt first with sulfuric acid, to get rid of the Chloride.
The remaining Rhodiumsulfate can be electrolysed. Cathode what ever you like. Anode carbon preferred.