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
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. 

Michelle Personick / Wesleyan University Wed, 06/23/2021 - 12:08
Inorganic Chemistry
Description

This course will emphasize the fundamental concepts needed to understand the diverse chemistry of all the elements of the periodic table. The common theme for the entire course will be Structure and Bonding. The primary focus will be inorganic molecules, ions and solids, but the concepts we will discuss are applicable to all aspects of chemistry. The first two-thirds of the course will cover theories of bonding in molecules and solids along with some background in symmetry and structure.

Dean Johnston / Otterbein University Mon, 04/26/2021 - 17:41

nanoCHAts: Informal conversations about teaching

Submitted by Hilary Eppley / DePauw University on Wed, 04/07/2021 - 14:33

A collection of all of the IONiC VIPEr NanoCHAts. These are short discussion on a teaching topic by 4-5 faculty members from different institutions. Each of these events is recorded and posted to the IONiC VIPEr YouTube Channel.

Buffer solutions Virtual Lab

Submitted by Mona Kulp / Smith College on Wed, 01/27/2021 - 15:34
Description

This is a virtual adaptation of a buffer capacity lab experiment using the chemcollective digital workspace.  Students learn to make buffers in different ways and then test the capacity of their buffers to understand what makes an optimal buffer.

SLiThErs - Supporting Learning with Interactive Teaching: a Hosted, Engaging Roundtable

A collection of all of the IONiC VIPEr SLiThErs (Supporting Learning with Interactive Teaching: a Hosted, Engaging Roundtable). These events are short presentations on a topic followed by a period of discussion between the presenter and live participants. Each of these events is recorded and posted to the IONiC VIPEr YouTube Channel.

Chip Nataro / Lafayette College Thu, 12/17/2020 - 14:18
Demonstration of Hard-Soft Acid-Base Theory: An Ion-Exchanger for Recovery of Rare Earth Metals
Description

The article from The Journal of the American Chemical Society by M. Kanatzidis et al describes a new ion-exchange material (FJSM-SnS) that shows high selectivity for rare-earth metals (REE) and very fast adsorption kinetics.  A number of techniques are used to characterize the properties of the compound that students may not be very familiar with but the article presents in an accessible way.

Gary L. Guillet / Georgia Southern University Armstrong Campus Wed, 07/08/2020 - 08:19