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Erik Joling Some examples from the project ‘Microscale experiments’

Erik Joling Some examples from the project ‘Microscale experiments’. U NIVERSITEIT VAN A MSTERDAM Faculty of Science. Prime Directive of Microscale Chemistry. Thou shalt not demonstrate. Glassware. Low-cost heating device. Chlorophyll from green leaves. methanol green leaves.

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Erik Joling Some examples from the project ‘Microscale experiments’

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  1. Erik JolingSome examples from the project ‘Microscale experiments’ UNIVERSITEIT VAN AMSTERDAM Faculty of Science

  2. Prime Directive of Microscale Chemistry Thou shalt not demonstrate MicroQuim 2000

  3. Glassware MicroQuim 2000

  4. Low-cost heating device MicroQuim 2000

  5. Chlorophyll from green leaves • methanol • green leaves MicroQuim 2000

  6. Experiments must… …be performed during a forty-five minute period …fit into the curriculum …replace the macroscale experiments in the textbook …open new perspectives MicroQuim 2000

  7. Column chromatography • aluminium oxide • mixture of potassium permanganate and potassium dichromate • 0.5M nitric acid • 1M sulfuric acid MicroQuim 2000

  8. Synthesis of indigo • 0.1 g 2-nitrobenzaldehyde • 0.3 ml acetone • 0.4 ml water • 2 ml 1M sodium hydroxide • 2 ml ethanol • 0.1 g sodium dithionite MicroQuim 2000

  9. Indigo STS-topic: • age-old natural dye • first synthetic dye • production by Hoechst and the decline of the Indian indigo culture MicroQuim 2000

  10. Sublimation of benzoic acid • benzoic acid • activated carbon • crunched ice MicroQuim 2000

  11. Esterificationacetic acid + 1-butanol = 1-butyl acetate + water One reaction, three experiments: • use of a catalyst • determination of equilibrium constant • upset the equilibrium MicroQuim 2000

  12. Contact me micro@chem.uva.nl www.chem.uva.nl/chemeduc/microschaal …/MicroQuim2000 MicroQuim 2000

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