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Electrochemical cell Lab June 2, 2006 Full Name

Electrochemical cell Lab June 2, 2006 Full Name Purpose: To draw and completely analyze four electrochemical cells. Procedure: As outlined by the instructor. Data:. 1. Cu, CuSO 4 ll Zn, ZnSO 4. 1. Cu, CuSO 4 ll Zn, ZnSO 4. 1. Cu, CuSO 4 ll Zn, ZnSO 4. 1.10 v. Cu. Zn.

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Electrochemical cell Lab June 2, 2006 Full Name

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  1. Electrochemical cell Lab June 2, 2006 Full Name Purpose: To draw and completely analyze four electrochemical cells. Procedure: As outlined by the instructor. Data:

  2. 1. Cu, CuSO4 ll Zn, ZnSO4

  3. 1. Cu, CuSO4 ll Zn, ZnSO4

  4. 1. Cu, CuSO4 ll Zn, ZnSO4 1.10 v Cu Zn

  5. 1. Cu, CuSO4 ll Zn, ZnSO4 1.10 v Cu Zn Cu2+ SO42- CuSO4(aq)

  6. 1. Cu, CuSO4 ll Zn, Zn(NO3)2 1.10 v Cu Zn Cu2+ Zn2+ NO3- SO42- CuSO4(aq) Zn(NO3)2(aq)

  7. 1. Cu, CuSO4 ll Zn, ZnSO4 1.10 v Cu Zn NaCl(aq) Na+Cl- Cu2+ Zn2+ NO3- SO42- CuSO4(aq) Zn(NO3)2(aq)

  8. 1. Cu, CuSO4 ll Zn, ZnSO4 1.10 v Cu Zn NaCl(aq) Na+Cl- Cu2+ Zn2+ NO3- SO42- CuSO4(aq) Zn(NO3)2(aq)

  9. 1. Cu, CuSO4 ll Zn, ZnSO4 1.10 v Cu Zn NaCl(aq) Greatest Electron Affinity + Cathode Reduction Cu2+ + 2e- → Cu(s) 0.34 v Gains mass Na+Cl- Cu2+ Zn2+ NO3- SO42- CuSO4(aq) Zn(NO3)2(aq)

  10. 1. Cu, CuSO4 ll Zn, ZnSO4 Salt Bridge:NaNO3 2e- 1.10 v 2e- Cu Zn NaNO3(aq) Greatest Electron Affinity + Cathode Reduction Cu2+ + 2e- → Cu(s) 0.34 v Gains mass Na+NO3- - Anode oxidation Zn(s)→ Zn2+ +2e- +0.76 v Loses mass Cu2+ Zn2+ NO3- SO42- CuSO4(aq) Zn(NO3)2(aq)

  11. 1. Cu, CuSO4 ll Zn, ZnSO4 Salt Bridge:NaNO3 2e- 1.10 v 2e- Cu Zn NaNO3(aq) Greatest Electron Affinity + Cathode Reduction Cu2+ + 2e- → Cu(s) 0.34 v Gains mass Na+NO3- - Anode oxidation Zn(s)→ Zn2+ +2e- +0.76 v Loses mass Cu2+ Zn2+ NO3- SO42- CuSO4(aq) Zn(NO3)2(aq) Overall Reaction: Cu2+ + Zn(s)→ Zn2+ +Cu(s) 1.10 v

  12. 2. Pb, Pb(NO3)2 ll Zn, Zn(NO3)2 Salt Bridge:NaNO3

  13. 3. Fe, Fe(NO3)2 ll Ni, Ni(NO3)2 Salt Bridge:NaNO3

  14. 4. Cu, CuSO4 ll Fe, Fe(NO3)2 Salt Bridge:NaNO3

  15. 5. Ni, Ni(NO3)2 ll Zn, Zn(NO3)2 Salt Bridge:NaNO3

  16. Conclusion State that you did what you set out to do in the purpose. Do I need to say, do not use pronouns? Start with the main rule and describe how you would completely analyze an electrochemical cell- use your notes! Discuss how you determined the anode, cathode, site of oxidation, and site of reduction. Discuss electron flow and ion migration. Explain the function of the salt bridge and what is meant by electron affinity. How did the experimental and predicted voltages compare?

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