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Carbohydrates Dehydration of sucrose, Fehling's test, Benedict's test, osazone formation, destructive distillation of wood, oxidation of sucrose with potassium chlorate, and guncotton are demonstrated.
Carbohydrates
Formation of Carbon from Carbohydrate Sulfuric acid has a very high affinity for water. It is shown to dehydrate a carbohydrate (sucrose) forming carbon. Sulfuric acid is reduced to sulfur dioxide, which bleaches a rose petal.
In a second experiment, the sulfur dioxide reduces purple permanganate to nearly colorless manganese(II).
The Different Periodic Tables of Dmitrii MendeleevMichael Laing Between 1869 and 1905 the Russian chemist Dmitrii Mendeleev published several tables with different arrangements of the chemical elements. Four of these are compared with periodic tables by Russian scientists from 1934 and 1969. Laing, Michael. J. Chem. Educ.2008, 85, 63.
Descriptive Chemistry |
Enrichment / Review Materials |
Periodicity / Periodic Table
Spectacular Pseudo-Exfoliation of an Exfoliated–Compressed GraphiteM. Comet, L. Schreyeck, S. Verdan, G. Burato, and H. Fuzellier This kind of reaction has been called pseudo-exfoliation of carbonaceous material. This demonstration spectacularly illustrates the layered nature of graphite. Comet, M.; Schreyeck, L.; Verdan, S.; Burato, G.; Fuzellier, H. J. Chem. Educ.2004, 81, 819.
Group IVAEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Descriptive Chemistry |
Periodicity / Periodic Table
The Silicon Family Volume 03, issue 17 of a series of leaflets covering subjects of interest to students of elementary chemistry distributed in 1929 - 1932.
Metalloids / Semimetals |
Materials Science
Silicon, Boron, and Their Compounds Volume 05, issue 16 of a series of leaflets covering subjects of interest to students of elementary chemistry distributed in 1929 - 1932.
