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!
hydrogen bonding
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.
Viscosity of Liquids - Capillary Length Test
Four funnels are connected to differing lengths of capillary tubing. The greater the length of the capillary tube, the longer it takes for the water to flow through the apparatus.