The Density Bottle is Red, the Density Bottle is Blue...
Tom Kuntzleman | Fri, 05/30/2025 - 10:10
You're going to love this new color variation on the Density Bottle experiment!
hydrogen bonding
The Diamonds of Winter
Tom Kuntzleman | Thu, 01/09/2025 - 09:44
Take a walk and explore the chemical winter wonderland of snowflakes...and diamonds!
Exploring Color Separation in Salting-Out Experiments
Tom Kuntzleman | Sat, 05/04/2024 - 07:44
Adding dyes to salting out experiments can create a variety of interesting color effects as the dyes differentially dissolve in the aqueous and organic layers. Can this differential solubility of dyes be explained using intermolecular forces as a guide?
Solution to Chemical Mystery #19: Multi-colored Mixture
Tom Kuntzleman | Sun, 02/06/2022 - 13:22
Did you figure out how to create a multi-colored mixture? Check out the solution to Chemical Mystery #19: Multi-colored Mixture!
Solution to Chemical Mystery #15: The Leaky Cup
Tom Kuntzleman | Mon, 05/27/2019 - 07:03
The solution to Chemical Mystery #15: The Leaky Cup is shown here.
Solution to Chemical Mystery #8: Go Blue!
Tom Kuntzleman | Wed, 11/09/2016 - 14:23
Solution to Chemical Mystery #8, and...a challenge!
Expanding My Use of Model Kits in the Chemistry Classroom
Lowell Thomson | Wed, 11/02/2016 - 09:05
In this blog post, I'll discuss how I've expanded my use of model kits within my chemistry class to help explore a variety of topics with my students.
Vapor Pressure: H-bonding vs. dipole-dipole attraction
The vapor pressures of butanol and diethyl ether are compared using barometers to show the effect of hydrogen-bonding on vapor pressure.
Ice Bomb
A cast iron bomb is completely filled with ice water, then placed into a dry-ice/acetone slush and covered with a wooden box. When the water in the bomb freezes, the cast iron bomb explodes, breaking into several pieces, and destroying the box in which it was placed.
Viscosity of Liquids - Qualitative Test
The flow of four different liquids from four pipets is started simultaneously to test their viscosity.