Box 1
Contains 109 Results:
Van't Hoff's molecular models, 2000
Museum Boerhaave, Leiden, Netherlands. Jacobus Henricus van't Hoff's cardboard models of malic, succinic, and tartaric acids. With these models he demonstrated the asymmetry that exists around a tetrahedral center in certain molecules.
Van der Waals surface, 2000
Museum Boerhaave, Leiden, Netherlands. Johann Diderik van der Waals (1873) PVT surface zaal bergran Zeist (1898). This plaster model depicts the pressure-volume-temperature behavior of a gas that is described by the van der Waals equation.
Quartz balance weights, 2000
Museum of the History of Sciences, Ghent University, Ghent, Belgium. Complete set of weights in quartz for a balance, dated 1887.
Benzene ring: Kekulé's sausages, 2000
Museum of the History of Sciences, Ghent University, Ghent, Belgium. Benzene ring modeled with August Kekulé von Stradonitz's sausages. Original dates from the 1800s; copy was made in the 1960s.
1,3,5-trimethyl benzene model, 2000
Museum of the History of Sciences, Ghent University, Ghent, Belgium. 1,3,5-trimethyl benzene molecular model made with tetrahedral centers.
Kaliapparat of Justus von Liebig, 2000
Museum of the History of Sciences, Ghent University, Ghent, Belgium. The kaliapparat was part of Justus von Liebig's method of combustion analysis. This apparatus was filled with KOH(aq). Carbon dioxide produced by combustion was absorbed in the KOH(aq), resulting in an increase in weight.
Alembic, 2000
Museum of the History of Sciences, Ghent University, Ghent, Belgium. Alembics were used for distillation through the end of the 19th century. The flask was heated and the vapors condensed on the inside of the cooler head at the top. The condensate then ran out the spout.
Kekulé's laboratory bench, 2000
Museum of the History of Sciences, Ghent University, Ghent, Belgium. August Kekulé von Stradonitz's laboratory bench, with distillation apparatus, including a Liebig condenser.
Kekulé's laboratory bench, 2000
Museum of the History of Sciences, Ghent University, Ghent, Belgium. August Kekulé von Stradonitz's laboratory bench, with a Liebig condenser.
Paper maché bottle for HF(aq), 2000
Museum of the History of Sciences, Ghent University, Ghent, Belgium. Paper maché bottle for HF(aq). HF(aq) attacks glass.