Tom Kuntzleman's blog

Chemical Mystery #7: Curious Cans

floating cans

​Q: Does an unopened can of soda pop float or sink in water?

A: It depends!

See if you can figure out what is happening in this twist on the classic floating-and-sinking soda can experiment.

Use Your Smartphone as an "Absorption Spectrophotometer"

Smartphone spectrophotometer

Learn a simple and very inexpensive way to build and use an "absorption spectrometer" using a smartphone. This is a great way to implement Beer's Law experiments in your classroom!

Using Chemistry to Find that Silver Lining

Silver plate: before and after

The chemistry of silver and the process in which silver becomes tarnished is explored. Take a new look at an old JCE Classroom Activity.

The Search for the Final Element


Have you ever wondered what is the theoretically largest possible value for the atomic number of an element? Using some introductory physics and algebra, you can get your students thinking about this idea.