Solubility combined with Buffer solutions ugh

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    Buffer Solubility
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SUMMARY

The discussion focuses on calculating the solubility of silver benzoate (C6H5COOAg) in a buffer solution with a pH of 3.20, utilizing the Henderson-Hasselbalch equation and the solubility product constant (Ksp) of 2.5 x 10^-5 M². Participants express frustration over incorrect calculations and seek clarification on the proper method to determine the concentration of benzoate ions ([C6H5COO]). The key takeaway is that knowing the pH allows for the calculation of the acid/base ratio but not the actual concentrations without additional information about the buffer concentration.

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  • Understanding of the Henderson-Hasselbalch equation
  • Knowledge of solubility product constant (Ksp) calculations
  • Familiarity with buffer solutions and their pH implications
  • Basic equilibrium chemistry concepts
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  • Learn how to calculate solubility using Ksp values
  • Research buffer solution preparation and its effects on solubility
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ultimateguy
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Homework Statement


Calculate the solubility of C6H5COOAg(s) in a buffer solution that has a pH of 3.20. (Ka = 6,5 x10^-5M ; Ksp = 2,5 x10^-5M^2)
a) 0,0164M
b) 0,0050M
c) 0,0287M
d) 0,0012M


Homework Equations



Henderson-Hasselbach, Ksp equation

The Attempt at a Solution



This is driving me nuts. I used Henderson-Hasselbach to find [C6H5COO], wrong answer, tried an equilibrium problem, wrong answer. Can someone give me a method for this. Thanks.
 
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could you illustrate your workings, maybe there is a calculation error or a way you used your equations wrongly
 
What is your buffer concentration? Knowing pH you can only calculate acid/base ratio, not their real concentrations.
 

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