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Interactive video lesson plan for: 21. Berzelius to Liebig and Wöhler (1805-1832)

Activity overview:

Freshman Organic Chemistry (CHEM 125)

The most prominent chemist in the generation following Lavoisier was Berzelius in Sweden. Together with Gay-Lussac in Paris and Davy in London, he discovered new elements, and improved atomic weights and combustion analysis for organic compounds. Invention of electrolysis led not only to new elements but also to the theory of dualism, with elements being held together by electrostatic attraction. Wöhler's report on the synthesis of urea revealed isomerism but also persistent naiveté about treating quantitative data. In their collaborative investigation of oil of bitter almonds Wöhler and Liebig extended dualism to organic chemistry via the radical theory.

00:00 - Chapter 1. Confusion over Silicon Chloride: Discussion on Atomic Weights and Equivalents
06:06 - Chapter 2. Combustion Analysis and the Beginnings of Electrolysis
15:56 - Chapter 3. Dualism: An Organizing Principle
23:07 - Chapter 4. The Honest Experimenter and the Persistent Naivety on Quantitative Data
29:18 - Chapter 5. Ammonium Cyanate, Urea, and the Idea of Isomerism
38:31 - Chapter 6. Wohler, Liebig, and Transmission of Dualism via the Radical Theory

Complete course materials are available at the Open Yale Courses website: http://open.yale.edu/courses

This course was recorded in Fall 2008.

Tagged under: Electrolysis,-bulb apparatus,Dualism,Potassium chlorate,Urea,Wöhler,Dr. Prout

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