Sciencemadness Discussion Board
Not logged in [Login ]
Go To Bottom

Printable Version  
Author: Subject: Silver Rhodium Separation
vehmently
Harmless
*




Posts: 6
Registered: 29-1-2018
Member Is Offline

Mood: No Mood

[*] posted on 21-4-2018 at 09:25
Silver Rhodium Separation


View user's profile View All Posts By User
vehmently
Harmless
*




Posts: 6
Registered: 29-1-2018
Member Is Offline

Mood: No Mood

[*] posted on 21-4-2018 at 09:26


Oops, wrong button. Anyone know a method to separate silver and rhodium ?
View user's profile View All Posts By User
CobaltChloride
Hazard to Others
***




Posts: 239
Registered: 3-3-2018
Location: Romania
Member Is Offline


[*] posted on 21-4-2018 at 09:51


Literature seems to say that rhodium doesn't react with nitric acid, but silver definitely does. Soaking the piece in nitric acid should dissolve the silver as silver nitrate, releasing NOx in the process and leave behind the rhodium. Problems may arise when your piece has a lot more rhodium than silver because of the phenomenon explained in this video https://www.youtube.com/watch?v=aX4Iq11j2dI . Do you know the percentage of each metal in the piece?


[Edited on 21-4-2018 by CobaltChloride]
View user's profile View All Posts By User
vehmently
Harmless
*




Posts: 6
Registered: 29-1-2018
Member Is Offline

Mood: No Mood

[*] posted on 21-4-2018 at 10:20


Wouldnt nitric work ?
View user's profile View All Posts By User
aga
Forum Drunkard
*****




Posts: 7030
Registered: 25-3-2014
Member Is Offline


[*] posted on 21-4-2018 at 10:24


Quote: Originally posted by vehmently  
Wouldnt nitric work ?

That's what CobaltChloride said 30 minutes ago.




View user's profile View All Posts By User
vehmently
Harmless
*




Posts: 6
Registered: 29-1-2018
Member Is Offline

Mood: No Mood

[*] posted on 21-4-2018 at 12:51


Thanks for the replies. I was offline for a bit and miss f the post.the Rh content is fairly low on average but might get up to 25% by wgt
View user's profile View All Posts By User
CobaltChloride
Hazard to Others
***




Posts: 239
Registered: 3-3-2018
Location: Romania
Member Is Offline


[*] posted on 21-4-2018 at 13:34


Then the method I described above should work.
View user's profile View All Posts By User
Fleaker
International Hazard
*****




Posts: 1238
Registered: 19-6-2005
Member Is Offline

Mood: nucleophilic

[*] posted on 30-4-2018 at 07:13


I don't know how soluble rhodium is in silver, or vice versa. Check a phase diagram! I seem to recall fire assay on silver never recovers rhodium well.



Neither flask nor beaker.


"Kid, you don't even know just what you don't know. "
--The Dark Lord Sauron
View user's profile View All Posts By User

  Go To Top