Electrochemistry Redox Oxidation Reduction Potato Clock My name

Electrochemistry Redox Oxidation / Reduction

Potato Clock

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

Rules for assigning oxidation states

Redox Reaction Zumdahl, De. Coste, World of Chemistry 2002, page 591

Electron Flow Zumdahl, De. Coste, World of Chemistry 2002, page 592

Ion flow keeps the charge neutral Zumdahl, De. Coste, World of Chemistry 2002, page 592

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

The porous disk allows ion flow Zumdahl, De. Coste, World of Chemistry 2002, page 592

Schematic of a Battery Zumdahl, De. Coste, World of Chemistry 2002, page 593

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

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

Standard Electrode Potentials

Types of Batteries • • • Lead Ni-cad Alkaline Rechargeable Mercury Lithium

One Cell of a Lead Battery Zumdahl, De. Coste, World of Chemistry 2002, page 595

The First Battery Alessandro Volta (1745 – 1827) Zinc disc Copper disc Newmark, CHEMISTRY, 1993, page 46 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.

A Mercury Battery Zumdahl, De. Coste, World of Chemistry 2002, page 596

A Common Dry Cell Battery Zumdahl, De. Coste, World of Chemistry 2002, page 596

Electroplating

Cathodic Protection of an Underground Pipe Zumdahl, De. Coste, World of Chemistry 2002, page 598