1. Redox Oxidation / Reduction
Electrochemistry
Redox
Oxidation / Reduction

2. Leo Ger “Lose electron  oxidation” “Gain electron  reduction”
My name is Leo.
Grr-rrrr…
Leo Ger
“Lose electron  oxidation”
Zn  2e- + Zn2+
“Gain electron  reduction”
2e- + Cu2+  Cu

3. Redox Reaction
Zumdahl, Zumdahl, DeCoste, World of Chemistry 2002, page 591

4. Electron Flow
Zumdahl, Zumdahl, DeCoste, World of Chemistry 2002, page 592

5. Ion flow keeps the charge neutral
Zumdahl, Zumdahl, DeCoste, World of Chemistry 2002, page 592

6. The salt bridge contains a strong electrolyte
Zumdahl, Zumdahl, DeCoste, World of Chemistry 2002, page 592

7. The porous disk allows ion flow
Zumdahl, Zumdahl, DeCoste, World of Chemistry 2002, page 592

8. Schematic of a Battery
Zumdahl, Zumdahl, DeCoste, World of Chemistry 2002, page 593

9. Simple Battery
Kelter, Carr, Scott, Chemistry A Wolrd of Choices 1999, page 487

10. Redox of a Battery
Kelter, Carr, Scott, Chemistry A Wolrd of Choices 1999, page 487

11. Types of Batteries
Lead
Ni-cad
Alkaline
Rechargeable
Mercury
Lithium

12. One Cell of a Lead Battery
Zumdahl, Zumdahl, DeCoste, World of Chemistry 2002, page 595

13. The First Battery Alessandro Volta (1745 – 1827)
Generate electricity by putting a layer
of cardboard soaked in brine between
discs of copper and zinc – a voltaic cell.
When he made a ‘pile’ of these cells, he
increased the amount of electricity generated.
This was the first battery – a collection of cells.
Zinc disc
Copper
disc
Newmark, CHEMISTRY, , page 46

14. A Mercury Battery
Zumdahl, Zumdahl, DeCoste, World of Chemistry 2002, page 596

15. A Common Dry Cell Battery
Zumdahl, Zumdahl, DeCoste, World of Chemistry 2002, page 596

16. Electroplating

17. Cathodic Protection of an Underground Pipe
Zumdahl, Zumdahl, DeCoste, World of Chemistry 2002, page 598