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2. Electrochemistry 1. What are electrode potentials? 3. Electrochemistry
1. What are electrode potentials? Zn 2+(aq) + 2e Zn(s) Fe 3+(aq) + e Fe 2+(aq) 2H +(aq) + e H 2 (g) Cu 2+(aq) + 2e Cu (s) 4. Electrochemistry 2. What can we know from electrode potentials? 5. Electrochemistry 2. What can we know from electrode potentials?
6. Electrochemistry 3. How can we measure standard electrode potentials? 7. Electrochemistry
3. How can we measure standard electrode potentials? 8. Electrochemistry 4. How can we use standard electrode potentials? 9. Electrochemistry
4. How can we use standard electrode potentials? I 2 + Cr 2+ feasible? V 3++ Cu 2+ feasible? 10. Electrochemistry 4. How can we use standard electrode potentials?
11. Electrochemistry Galvanic Cells 12. Electrochemistry 5. How to distinguish anode and cathode? Galvanic Cell 13. Electrochemistry 5. How to distinguish anode and cathode? Positive remove electronsReduction Cathode Negative produce electronsOxidation Anode Electrons flow from A C Galvanic Cell 14. Electrochemistry 6. How to draw cell diagram? 15. Electrochemistry 6. How to draw cell diagram? Example 16. Electrochemistry 6. How to draw cell diagram?
Pt (s) | Anode || Cathode | Pt (s) Pt (s) | Fe 2+Fe 3+|| H +H 2| Pt (s) Pt(s) | Fe 2+ , Fe 3+ (aq) || H + (aq) | H 2 (g) | Pt(s) 17. Electrochemistry Electrolytic Cells 18. Electrochemistry 7. How to distinguish anode and cathode? Electrolytic Cell 19. Electrochemistry 7. How to distinguish anode and cathode? Positive attract anionsoxidized Anode Negative attract cationsreduced Cathode Electrons flow from A C Electrolytic Cell 20. Electrochemistry 8. How to predict what species is discharged?
21. Electrochemistry Calculations (Strategy) Question willsurelyinvolve 1 or more of the formulas: Q = It = n F I: current (A) n: moles ofelectrons! t: time ( s ) F: Faradays constant (96500 C/mol) F = Le L: Avogadros constant e: 1.6 x 10 19C
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