Thermal paper such as that used for point of sale receipts typically functions by darkening when exposed to heat. The pigment system used in this paper also darkens when exposed to solvents of intermediate polarity and acids. This enables thermal paper to be used as an inexpensive sort of indicator paper for a variety of demonstrations.
Inspired by a recent article in the Journal of Chemical Education, Tom Kuntzleman attempted to extract lithium from a coin battery, and to use the extracted lithium to produce a pink flame.
The familiar soda fountains that can be produced by adding Mentos candies to plastic bottles of carbonated beverages can also be produced by adding objects to carbonated beverages in aluminum cans. A variety of simple methods for producing soda fountains from cans are described.
Check out the solution to Chemical Mystery #18: Peek A Boo Blue!
The differing electrostatic and solubility properties of starch and polystyrene foam packing peanuts are used in various demonstrations to describe aspects of microplastics and their interactions with the environment. Their differing responses to exposure to liquid nitrogen and iodine solutions are also described.
Summertime means doing chemistry experiments with flowers found growing in the yard...
Being a teacher during the pandemic was a transformative experience. But it's unlikely no one came out of the pandemic unscathed in some way. The scars are real and learning to accept them is part of the process in returning to "normal", which was an illusion and did not work well for many. Post-pandemic, how will my teaching change?
Some explorations and explanations regarding superconductors and the quantum levitation (also known as quantum locking) experiment.
During the last few semesters, a small survey has been deployed at Bradley University where students were to describe and classify items of litter that they found. The purposes of the surveys were to get students thinking about some of the chemical implications of solid waste and give the students some experience with a citizen science project. The most recent iteration of the survey, and some of its results, are described.
Kristen Drury explains some major shifts in her teaching philosophies and how her flipped classroom has evolved as a result.