Liesegang Rings
Contributed By
- Original Source:Oregon Museum of Science and Industry
Conditions of Use:None Specified
Description
This display shows slow chemical reactions in colorful crystal formations known as Liesegang Rings. They are named after R.E. Liesegang, a German chemist and photographer who first documented them in 1896. These reactions are similar to those forming the rings formed in agates. These reactions are a good project for upper-level chemistry students to investigate and observe their development over a period of days weeks and months. It's been documented that these reactions will last for up to 30 years. One chemical is suspended in a sodium silicate gel. Another chemical is then layered on top of the gel. As the chemical on top of the gel diffuses through the gel, it reacts with the chemical suspended in the gel. The operating guide details the chemical composition of the five different chemicals and gels, and provides documentation for articles to research for more recipes and background information. Less
Learning Registry Activity
Bookmarks
Topics and Grades
Grade: 6 to 12
Topics: Current Science, Earth & Space Science, Physics, Chemical Reactions & Stoichiometry, Geology & the Dynamic Earth, Earth's Resources, Agriculture & Natural Resources, Chemistry, Evolution and Adaptation, Ecology & Ecosystems
Resource Pedagogy
Resource Type/Classification:
- Teacher Materials
Tool for: Students