The Sheffield Chemputer is a site that does a variety of calculations including: isotope patterns, element percentages, reaction yields, oxidation states (for transition metal complexes), electron accounting (for metal complexes), VSEPR shape and classification using the CBC method. At the initial point of this post (April 29, 2014) parts of the site are still under development, but it seems to be off to a good start.
Two excellent video presentations on symmetry. The Ted Talk by Marcus du Sautoy is an excellent introduction to the concept of symmetry and systematically describing it. In "Impossible Crystals" Nobel Laureate and physicist Paul Steinhardt discusses the creation of "Impossible crystals": quasi-crystals with five-fold symmetry previously believed impossible.
Description: This is an in class activity I use for first year general chemistry students to understand the relationship between quantum numbers and the structure of the atom.
This in-class activity is intended to help visualize the meaning of the subscripts and coefficients in molecular formulas that appear in balanced chemical equations. It has been my experience that students in 2nd semester general chemistry can sometimes still be confused about this fundamental aspect of chemical language. It substitutes edible candy for the atoms in a molecular model kit, thus allowing students to eat the atoms at the end. (My philosophy is that if students are eating, they're probably awake and could be learning!)
This lab experiment is designed to introduce the electromagnetic spectrum to non-science majors in a food chemistry course by using everyday food (i.e. Kool-Aid packets). Students will use a spectrophotometer to correlate wavelength to color, as well as determine the mass percent of certain colored dyes in a Kool-Aid sample. Paper chromatography is also introduced to determine the number of dyes in a Kool-Aid sample. This lab is adapted from Sigmann, S; Wheeler, D. J. Chem. Ed., 2004, 81, p. 1475.
Chemical acrostic is used as a teaching tool in descriptive inorganic chemistry. This is an active learning approach to engage the students with a fun classroom activity. The acrostics are designed by Simon Cotton and published in the Royal Society of Chemistry's education resource magazine "The Mole." The students are divided into groups of two or three to work on the acrostics. To come up with the answers, the students engage in meaningful group discussions that enhance conceptual understanding.
At this website students can access interactive game-like learning resources that cover a wide range of topics in general chemistry. These learning activities, which are in the form of flash cards, quizzes and matching games, will help student learn and review/drill important general chemistry topics.
This is a group activity I developed for my "Introduction to Chemistry" class, which is set up primarily to cover the topics we consider to be prerequisites for the first course in our chemistry sequence at Carleton. However, it covers aspects of thermodynamics (e.g., particularly Hess's Law) that are core topics for most intro courses.
Recent versions of Wolfram's Mathematica software have access to a variety of curated data sets that are relevant to Chemists. This activity is an example of how one can use the ElementData dataset to develop an on-line tool to explore periodic trends. Wolfram provides a free web-based platform (the FreeCDF plugin) to view and interact with specifically designed Mathematica files. The activity can be accessed in one of three ways: