Blogs

ChemEd X contributors offer their ideas and opinions on a broad spectrum of topics pertaining to chemical education.

Blogs at ChemEd X reflect the opinions of the contributors and are open to comments. Only selected contributors blog at ChemEd X. If you would like to blog regularly at ChemEd X, please use our Contribution form to request an invitation to do so from one of our editors.

by Josh Kenney
Mon, 02/27/2023 - 09:31

In a classic demonstration of energy conservation, smashing two large steel ball bearings generates sufficient heat to burn a hole through a piece of paper. Josh Kenney found this demonstration underwhelming because the paper doesn't look burned. So, he upgraded the experiment by covering the paper in Elmer's Color Changing Glue. Now, a spectacular color change reveals the increase in heat!

Recent activity: 1 year 3 months ago
by Michael Jansen
Tue, 02/21/2023 - 08:31

Michael Jansen offers one of his favorite demos - producing liquid CO2 from dry ice.

Recent activity: 1 year 3 months ago
by Josh Kenney
Tue, 01/24/2023 - 15:42

TikTok and YouTube Shorts are video sharing platforms for short-form, vertical aspect videos. Both of these services are growing more quickly in popularity compared to more traditional video formats. Josh Kenney shares some of the ways that he is using short-form videos in his chemistry class and shares a free resource (an exam review worksheet that links to a YouTube Shorts playlist through a QR code).

Recent activity: 1 year 4 months ago
by Dean Campbell
Mon, 01/23/2023 - 14:11

Egg cartons and small objects such as milk jug caps or plastic eggs can be used to illustrate chemical concepts. The egg cartons can be cut into trays to represent atoms or to represent energy levels associated with atomic orbitals. The plastic caps or eggs distributed among the dimples of the trays can be used to represent electrons or pairs of electrons.

Recent activity: 1 year 4 months ago
by Tom Kuntzleman
Wed, 01/04/2023 - 09:56

Some metals and metal alloys undergo a transition to brittleness at cold temperature. This phenomenon likely contributed to the demise of the Titanic.

Recent activity: 2 months 3 weeks ago
by Dean Campbell
Tue, 01/03/2023 - 08:05

Describing the number density of molecules involved in chemistry demonstrations while presenting those demonstrations can help to convey concepts such as the small size of molecules and how the distance between molecules can vary during change of physical state.

Recent activity: 1 year 5 months ago
by Dean Campbell
Sat, 12/03/2022 - 21:08

Short descriptions of demonstrations and props that Dean Campbell has used while teaching his collegiate Environmental Chemistry course. Many of these examples are also suitable for use in high school and collegiate General Chemistry courses.

Recent activity: 4 months 1 week ago
by Karen Sorensen
Sun, 11/20/2022 - 14:10

Exploring science claims found on social media helps students practice applying the claim, evidence, reasoning framework.

Comments: 3
Recent activity: 1 year 4 months ago
by Joseph Lomax
Sat, 11/12/2022 - 22:28

Sometimes the obvious is the most difficult to see. Even after teaching for four decades, there is still something to learn from students. What did I recently learn? Check out my post. 

Recent activity: 5 months 1 week ago
by Philip Root
Sat, 11/12/2022 - 20:43

Find out how laboratory activities can be used as the starting point for scientific model development rather than as the endpoint, or verification, of concepts presented in lecture. This post deals with density.

Recent activity: 1 year 7 months ago