Stuck with a problem in electrochemistry

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SUMMARY

The discussion focuses on calculating the cell potential (Ecell) of a galvanic cell composed of two silver electrodes in saturated solutions of AgBr and Ag2CrO4 at 298K. The solubility product constants (Ksp) for AgBr and Ag2CrO4 are provided as 5x10-13 M2 and 2.4x10-12 M3, respectively. Participants clarify that the standard electrode potential (E0) for the Ag(s)/Ag+ system should be used, and that E0 cancels out in the Nernst equation, allowing for a focus on the concentration values derived from the Ksp calculations.

PREREQUISITES
  • Understanding of galvanic cells and electrochemical principles.
  • Familiarity with solubility product constants (Ksp).
  • Knowledge of the Nernst equation and its application in electrochemistry.
  • Ability to calculate ion concentrations from Ksp values.
NEXT STEPS
  • Study the Nernst equation in detail, focusing on its application in galvanic cells.
  • Learn how to calculate ion concentrations from Ksp values for various compounds.
  • Explore the concept of standard electrode potentials and their significance in electrochemical cells.
  • Investigate the effects of temperature on electrochemical reactions and cell potentials.
USEFUL FOR

Students and educators in chemistry, particularly those focusing on electrochemistry, as well as researchers interested in galvanic cell applications and calculations.

johncena
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Homework Statement


A galvanic cell consisting of two silver electrodes,one in a saturated solution of AgBr and the other in a saturated solution of Ag2CrO4 is prepared.Calculate the value of Ecell at 298K Given Ksp(AgBr) = 5x10-13 M2 and
Ksp(Ag2CrO4)=2.4x10-12M3


Homework Equations


to find conc from Ksp
and
Nernst equation
77fd93e90bedd188d9d0c0b65cfa49a5.png


The Attempt at a Solution



I got the conc of Ag+ in both the solutions ... but i don't know how to substitute them...(means ...i don't know which comes in the numerator of the logarithm)
and Is the value of E0 to be taken as 0? How ?

pls help...

thanks in advance:smile:
 
Physics news on Phys.org
Report the potential as positive. E0 cancels out, but technically you should use value for the Ag(s)/Ag+ system.
 
thank you sir...

i am getting it now...:smile:
 

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