[strewart]

I have an odd solution of silver potassium sulfate (AgKSO4) which I can't find anything about online. I would like to determine concentration of the ions. Is it possible to analyse by gravimetric analysis? I could add NaCl to form AgCl precipitate. I imagine the Ag is pretty low concentration because Ag2SO4 is not very soluble. Then precipitate the SO4 with either Ca2+ or Pb2+.

Would this work?

[Hunter2]

I would do a titration for silver. Or if you have modern equipment AAS or ICP.

[AWK]

Then precipitate the SO4 with either Ca2+ or Pb2+

In gravimetric analysis rather Ba²⁺ is used.

[strewart]

I would do a titration for silver. Or if you have modern equipment AAS or ICP.

A method something like this?
Reverse titration, known NaCl solution in flask, unknown Ag+ solution in burette, chromate indicator in flask. AgCl binds preferentially until Cl runs out, then indicator turns orange when silver chromate starts forming.

Then precipitate the SO4 with either Ca2+ or Pb2+

In gravimetric analysis rather Ba²⁺ is used.

I will see if we have any, I suggested the others because we are much likely to have them.

[Borek]

A method something like this?
Reverse titration, known NaCl solution in flask, unknown Ag+ solution in burette, chromate indicator in flask. AgCl binds preferentially until Cl runs out, then indicator turns orange when silver chromate starts forming.

Why reverse titration? Can't you just try a direct approach? And there is no need to invent your own method, determining silver is about as old as modern chemistry.

http://www.titrations.info/precipitation-titration-argentometry-chlorides-Mohr

(Note: direct Mohr method is for chlorides, but when titrating Ag⁺ with the NaCl everything that has been told there holds).

[strewart]

A method something like this?
Reverse titration, known NaCl solution in flask, unknown Ag+ solution in burette, chromate indicator in flask. AgCl binds preferentially until Cl runs out, then indicator turns orange when silver chromate starts forming.

Why reverse titration? Can't you just try a direct approach? And there is no need to invent your own method, determining silver is about as old as modern chemistry.

http://www.titrations.info/precipitation-titration-argentometry-chlorides-Mohr

(Note: direct Mohr method is for chlorides, but when titrating Ag⁺ with the NaCl everything that has been told there holds).

Thanks for the link. Thats pretty much exactly the method I described anyway so good to see I was on the right track.