CheMagic Demonstration Video: Alchemy
Alchemy: The ALCHEMY chemical demonstration can be used to illustrate redox chemistry. However, it also shows the importance of descriptive language in chemistry. Alchemists believed that displacement reactions of the type shown here were examples of transmutation. The issue was having clear definitions of chemical elements and chemical compounds and the ability to use the vocabulary associated with these definitions to describe chemical reactions. The alchemical era was a necessary step along the path of understanding. Demonstrations of this type are useful in teaching chemical philosophy.