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Mathematix
Mathematix asked in Science & MathematicsChemistry · 8 years ago

Standard Potential 10 Points?

Suppose I have a copper cathode and zinc anode in a 1M NaCl solution, what are the half equations and calculate the standard potential

Thanks in advance!

Update:

Zn becomes ionized, goes into solution and loses two electrons, but where do the copper ions come from?

2 Answers

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  • ?
    Lv 7
    8 years ago

    Cu2+ + 2e ---> Cu

    Zn --> Zn2+ + 2e-

    Standard potential = Cu reduction potential - Zn reduction potential

    EDIT: That's a good point. No reaction would occur if there are no ions in the solution with a greater standard reduction potential than Zn. I assumed there were copper ions in the solution.

  • Varaprasad
    Lv 4
    8 years ago

    zn SRP is -0.76 V act as anode

    CU SRP is +0.34 v act as cathode

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