How Do You Draw Cell Diagrams Correctly?

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SUMMARY

The discussion focuses on the correct method for drawing cell diagrams in electrochemistry, specifically involving the half-reactions of vanadium species. Participants clarify that the stronger reducing agent, V3+, should be placed on the left side of the cell diagram, while VO2+, the oxidizing agent, is on the right. The importance of balancing half-reactions, including the inclusion of electrons, is emphasized. The final answer provided is option C, which correctly represents the reaction components.

PREREQUISITES
  • Understanding of electrochemical cell diagrams
  • Knowledge of half-reaction balancing
  • Familiarity with oxidation and reduction concepts
  • Basic chemistry terminology related to redox reactions
NEXT STEPS
  • Study the Nernst equation for calculating cell potentials
  • Learn about the standard electrode potentials of vanadium species
  • Explore the concept of galvanic cells and their applications
  • Review common mistakes in balancing redox reactions
USEFUL FOR

Chemistry students, educators, and anyone preparing for exams in electrochemistry or redox reactions will benefit from this discussion.

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Homework Statement


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Homework Equations


The Attempt at a Solution



I always thought you put the electrolyte of one half cell on one side and the other electrolyte on the other side

The answer given is C.
But this includes VO2+ which is not in the initial eqn on the RHS?
 
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Try to split the reaction into half reactions.
 
borek said:
try to split the reaction into half reactions.

V3+ + H2O = VO2+ + 2H+
VO2+ + H2o = VO2+ + 2h+
 
They are not balanced yet (you ignored electrons), but you are on the right track.

Do you see why C?
 
Borek said:
They are not balanced yet (you ignored electrons), but you are on the right track.

Do you see why C?

Well V3+ is oxidised (reducing agent) and VO2+ is reduced (oxidising agent).
I think you are supposed to put the stronger reducing agent on the left side?
 
jsmith613 said:
I think you are supposed to put the stronger reducing agent on the left side?

Isn't it what they did?
 
Borek said:
Isn't it what they did?

...of course...I think I just get confused between VO2+ and VO2+.

...I guess though this will help me in exams as I will be more aware of what is going on...thanks for helping me :)
 

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