The Chemistry of Lightning
Tom Kuntzleman | Tue, 09/20/2022 - 09:42
Learn a bit about the chemical reactions that occur during a lightning strike, and how you can demonstrate these reactions in your classroom.
thermodynamics
Resources for Teaching Art, Archaeology, and Chemistry
Melanie Harvey | Tue, 09/06/2022 - 21:01
A variety of resources are available for chemistry faculty interested in incorporating lessons and activities around art and archeology. Find out what they are in this follow up post from the inaugural ChemEd X virtual Journal Club held April 2022.
Exploring The “Two-Faced” Thionin Reaction
Tom Kuntzleman | Tue, 04/19/2022 - 11:44
The "Two-Faced" thionin reaction involves causing a purple solution to fade to colorless by shining light on the solution. I wondered if it could be demonstrated the color of light that caused this transition.
Generating explosive gases from sand
Tom Kuntzleman | Fri, 01/07/2022 - 12:16
Did you know that sand can be converted into a mixture of gases that spontaneously ignites in air? The procedures involved are relatively simple to perform, spectacular to observe, and relate to a rich assortment of chemical principles.
Heat, The Ocean, and Climate Change
Tom Kuntzleman | Fri, 10/16/2020 - 10:14
Learn a simple way to relate the heat equation (Q = mc∆T ) to climate change.
Gibbs Free Energy Analogy
Kristen Drury | Thu, 04/04/2019 - 08:37
A common topic in chemistry discussion groups and forums is about the use of the terms “spontaneous reaction” versus “thermodynamic favorability”. This is a new activity for chemistry students who struggle with the correlation between changes in enthalpy, temperature, entropy, and the Gibbs free energy of a system; which relies on an analogy that most students will be familiar with.
Are Diamonds Forever? A Chemical Investigation
Tom Kuntzleman | Fri, 11/02/2018 - 14:04
You are likely aware that diamonds are converted - albeit slowly - to graphite under normal conditions. Thus, diamonds don't last forever, in contrast to the popular advertising slogan. However, did you know that you can use chemistry to prove that diamonds are not forever? It's simpler than you think...
Demonstration: Reaction of Magnesium and Silver Nitrate
Kaleb Underwood | Tue, 05/02/2017 - 08:55
I found a version of this demonstration online a couple of years ago. I admit, when I first tried it with my class it was mostly for a crowd pleaser to demonstrate the activity series of metals, but I then became very intrigued by the processes occurring. The original source only referenced the “single replacement reaction” between Mg(s) and AgNO3(aq). Therefore, when I saw a grayish product (silver) I was not surprised. However, I was surprised by the white flash and the production of a white product, which were reminiscent of the classic combustion of magnesium demonstration. This led to some research and my conclusions that follow. Read through to the end and you will find a video of the demo.
Solution to Chemical Mystery #6: The Case of the Collapsing Can
Tom Kuntzleman | Sun, 06/05/2016 - 17:12
Solution to Chemical Mystery #6 is presented. Also, concepts related to the chemical can crush demo are briefly discussed.