Predicting reactivity with the HSAB principle

Submitted by Michelle Personick / Wesleyan University on Wed, 06/23/2021 - 16:07
Description

This activity is designed to give students practice with predicting the preferred direction of double displacement reactions using the hard-soft acid-base (HSAB) principle. It includes a question where students must determine the relative softness of two soft bases. This activity was used after the lecture where students were introduced to these concepts.

Acids, Bases, and Solubility Rules

Submitted by Michelle Personick / Wesleyan University on Wed, 06/23/2021 - 15:07
Description

This activity is designed to serve two purposes. The first is to give students practice with assigning the acidity of cations (acidic or non-acidic) and the basicity of anions (basic, feebly basic, or non-basic). The second is to guide students to discover the general trends in solubility for combinations of Bronsted acids and bases. The thermodynamic underpinnings of these generalized "solubility rules" are taught in the subsequent lecture.

Determining the Basicity of Oxo Anions

Submitted by Michelle Personick / Wesleyan University on Wed, 06/23/2021 - 12:50
Description

This is an in-class activity that I use in my advanced general chemistry course to teach students how to qualitatively assign oxo anions as non-basic, feebly basic, or basic. Being able to qualitatively make these assignments helps students when we get to predicting solubility of compounds using Bronsted acidity and basicity.

Reactions of cations with water

Submitted by Michelle Personick / Wesleyan University on Wed, 06/23/2021 - 12:38
Description

This is an in-class activity that I use in my advanced general chemistry course to teach students how to rank the relative acidity of monoatomic cations and how to qualitatively predict the strength of the interaction of these cations with water (hydration and hydrolysis).

Introduction to reactions of ions with water

Submitted by Michelle Personick / Wesleyan University on Wed, 06/23/2021 - 12:08
Description

This is an in-class activity that I use in my advanced general chemistry course right before I start teaching about the relationship between the Bronsted acidity of cations and their hydration/hydrolysis. This is the first topic in the course (reactions of ions in aqueous solution), and we would have just spent a lecture reviewing intermolecular forces. 

nanoCHAt #10: Mentoring in the classroom, part 2

Submitted by Shirley Lin / United States Naval Academy on Mon, 06/21/2021 - 10:42
Description

A nanoCHAt conversation about ways that instructors can mentor students in the many-to-one environment of the classroom. Recorded by VIPEr Fellows Carmen Bustos-Works, Robin Macaluso, and Stephanie Poland with Shirley Lin (moderator) on May 25, 2021.  The full nanoCHAt playlist can be accessed at https://www.youtube.com/playlist?list=PL2wnHWA8OaA5Y6pPaOk2zt6wwrd2HK6kP

nanoCHAt #8: Leveling the playing field, part 2

Submitted by Shirley Lin / United States Naval Academy on Mon, 06/21/2021 - 10:35
Description

A nanoCHAt conversation about ways that instructors can level the playing field for students coming into a course with a variety of academic backgrounds. Recorded by VIPEr Fellows James Dunne, Megan Lazorski, Rudy Luck, and Claude Mertzenich with Shirley Lin (moderator) on April 1, 2021.  The full nanoCHAt playlist can be accessed at https://www.youtube.com/playlist?list=PL2wnHWA8OaA5Y6pPaOk2zt6wwrd2HK6kP

SLiThEr #20: African American Chemists: Academia, Industry, and Social Entrepreneurship

Submitted by Chip Nataro / Lafayette College on Tue, 06/15/2021 - 07:33
Description

Sibrina Collins (Lawrence Tech) presented a SLiThEr on April 10, 2021. The topic was her recently releases ACS Symposium Series book entitled "African American Chemists: Academia, Industry, and Social Entrepreneurship". Sibrina presented on stories, both hearing them and telling them. She recounted how she used the VIPEr model of learning objects to make the stories in the book accessible for use in the classroom. 

Creating Accessible Documents, pdfs, and Slides - Web Resources and Checklists

Submitted by Nicole Crowder / University of Mary Washington on Thu, 06/10/2021 - 11:43
Description

Creating Word files, pdfs, and PowerPoint files in an accessible way addresses equity in the classroom. These web resources are focused on how to create materials for your courses that will be more accessible. There are also some checklists to consult as you are creating materials for your courses (and LOs for this website!) to ensure they meet some basic accessibility guidelines.

*Note that some of the materials link to or refer to resources specific to the University of Mary Washington, but you should be able to find similar resources at your institution.*

Activation of carbon dioxide by zirconium amides

Submitted by Adam Johnson / Harvey Mudd College on Tue, 06/08/2021 - 14:48
Description

The O'Hare group has studied complexes of the permethylpentalene ligand, and recently reported the reaction of a zirconium complex of this ligand with CO2 to form the carbamate. A series of three different complexes were prepared, each with slightly different products upon reaction with CO2, illustrating subtle differences in reactivity based on either sterics or electronics. To further tangle the web, entropic and enthalpic considerations can also be considered.