July 04, 2020, 05:33:47 PM
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Topic: Need help to choose a titration method  (Read 217 times)

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Offline Golia

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Need help to choose a titration method
« on: May 20, 2020, 10:48:51 AM »
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.

Offline Borek

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Re: Need help to choose a titration method
« Reply #1 on: May 20, 2020, 02:04:17 PM »
Think what can be present in the ground water and interfere with the titration.
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Offline Golia

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Re: Need help to choose a titration method
« Reply #2 on: May 20, 2020, 03:35:00 PM »
Think what can be present in the ground water and interfere with the titration.

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 +?

Offline Borek

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Re: Need help to choose a titration method
« Reply #3 on: May 20, 2020, 06:33:32 PM »
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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