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Need help to choose a titration method

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Golia:
Hello, I have to choose a method to determine Ag +% in groundwater (Morh, Volhard or Fanjas). I don't have to do calculations.

The thing is, I don't know how to start, should I assume that the groundwater has Ag +?
In the exercises, I only solve problems to determine the Cl-% or [Cl-] but never with Ag + and in the books I found the 3 methods, but I always use them to determine Cl-
Could someone help me with this? I think I have to choose Volhard's Direct Method, but I'm not sure. Sorry if this is a dumb question.

Borek:
Think what can be present in the ground water and interfere with the titration.

Golia:

--- Quote from: Borek on May 20, 2020, 02:04:17 PM ---Think what can be present in the ground water and interfere with the titration.

--- End quote ---

Maybe Cl- or other halides, but if I have to determine Ag + in the groundwater, can I relate it in the calculation or is there another way to determine Ag +?

Borek:
Try to google what is the typical concentration of Cl- in ground waters.

What would be maximum Ag+ concentration possible?

What are reasonable limits of the Ag+ concentration that can be measured with the titration?

Do these numbers overlap?

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