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 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.


Recent activity: 7 months 2 weeks ago
by Melissa Hemling
Fri, 04/08/2022 - 10:40

Here is a quick way to use DocHub to update the formatting of the older AP Chemistry Free Response questions so it matches the new (2021) format!

Recent activity: 7 months 3 weeks ago
by Dean Campbell
Wed, 04/06/2022 - 13:39

Flat, symmetrical molecules can be modeled by folding a sheet of paper, cutting patterns into the folded structure, and unfolding to produce the flat paper models. The finished models resemble paper snowflakes, but have a variety of rotational symmetries. Template patterns for several molecules are available for download in the Supporting Information.

Recent activity: 7 months 4 weeks ago
by Philip Root
Mon, 04/04/2022 - 20:05

Please welcome Phil Root as a new ChemEd X two-year college (2YC) lead contributor. This is his first blog. Enjoy...

Recent activity: 7 months 4 weeks ago
Mon, 04/04/2022 - 10:00

A kaleidocycle is presented in which the entire periodic table has been collected. In this three-dimensional figure are the elements organized in four blocks according to their final electronic structure. It is intended that students with this playful figure actively participate in classes by rotating their kaleidocycle looking for the groups or elements that are being studied. The entire periodic table fits in one palm of their hands. It is also a didactic device because students only focus their attention on one block or group of elements from the entire Periodic Table. It can be achieved a more entertaining, motivating and exciting learning about the subject of the Periodic Table.

Recent activity: 8 months 10 hours ago
by Scott Donnelly
Mon, 03/28/2022 - 23:43

Structure. Structure. Structure. This blog post describes a classroom activity where students propose the structure of a molecule- based on bond type information- used to accelerate the change in color of red table grapes. 

Recent activity: 8 months 5 days ago
by Melissa Hemling
Mon, 03/21/2022 - 23:07

Learn how to create cognitively demanding tasks for your classroom during this Knowles Academy virtual course. 

Recent activity: 8 months 1 week ago
by Dean Campbell
Mon, 03/21/2022 - 20:54

For your enjoyment, we present lists of chemically-related words that end in the letters “-cation” but do not actually refer to the positively-charged chemical species. The lists are available for download in the Supporting Information.

Recent activity: 8 months 1 week ago
by Chad Husting
Sat, 03/19/2022 - 09:34

Chad Husting tries out some micro-scale labs. 


Recent activity: 8 months 2 weeks ago
by Josh Kenney
Fri, 03/04/2022 - 18:50

Practice problem answer keys that provide correct and incorrect answers increase student metacognition and lead to more thorough learning.

Comments: 2
Recent activity: 8 months 3 weeks ago