How Do You Calculate pAg in Precipitation Titrimetry?

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Discussion Overview

The discussion revolves around calculating the pAg in the context of precipitation titrimetry, specifically after the addition of varying volumes of AgNO3 to a solution of KBr. Participants explore the definitions and calculations involved in determining pAg.

Discussion Character

  • Homework-related, Conceptual clarification, Technical explanation

Main Points Raised

  • One participant presents a calculation attempt for pAg after adding 5ml of AgNO3, expressing confusion about when and how to calculate pAg.
  • Another participant asks for the definition of pAg, indicating a need for clarity on the term.
  • A different participant defines pAg as the P-function of Ag, which may imply a specific mathematical relationship.
  • There is a note on the importance of capitalization in pAg versus PAg, suggesting a distinction similar to that between pH and PH.

Areas of Agreement / Disagreement

The discussion does not reach a consensus on the calculation method for pAg, and participants express varying levels of understanding regarding its definition and calculation.

Contextual Notes

Participants have not fully resolved the assumptions or definitions related to pAg, and there may be dependencies on specific equations or concepts not fully articulated in the posts.

Pruddy
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Homework Statement


Calculate the pAg after the addition of 5ml, 40ml, and 45ml of 0.05M AgNO3 to 50.00ml of 0.04M Kbr (AgBr Ksp = 5 x 10^-13)


Homework Equations





The Attempt at a Solution


when 5ml of AgNo3 is added , we have
(50 x 0.004 - 5 x 0.05)/55
= 0.0318
P(kbr) = -log 0.0318
= 1.497

The point is that I don't know when and how to calculate the Pag. I find this topic very confusing.I will be very gratefull if anyone can give me a hint on how to solve this problem. Thanks
 
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What is the definition of pAg?
 
PAg means the P-function of Ag.
 
So what do you need to calculate pAg? (note the capitalization - pAg, not PAg, just like pH and not PH).
 

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