Teaching about hypervalent structures is problematic. This post discusses a simple and quick way in determining the number of lone pairs on a hypervalent central p-block atom.
The December 2020 issue of the Journal of Chemical Education is now available online to subscribers. Topics featured in this issue include: teaching during COVID-19; examining models used by students; chemical structure; game-based learning; interdisciplinary courses; teaching chemistry using plants; laboratory instruction with real-world context; fluorescence; exploring spectroscopy; thermodynamics; chemical education research; from the archives: photography.
Learn how to form a blue-green copper compound on a penny, and then use that compound to make green flames. This is a great summer time activity for your next campfire!
Chemistry Education in Times of Disruption
The May 2020 issue of the Journal of Chemical Education is now available online to subscribers. Topics featured in this issue include: understanding structures; digital information and web-based learning; exploring everyday chemistry; curriculum innovations; games for teaching; NMR spectroscopy; examining properties of organic liquids; biochemistry laboratories; analytical and physical chemistry laboratories; computational chemistry; innovative low-cost instruments; research on knowledge and skills for teachers and chemists; from the archives: hands-on chemistry at home.
Solutions of copper (II) dissolved in acetone are easy to prepare, and can display orange, yellow, green, and blue color depending upon conditions. Such solutions allow for a variety of demonstrations and experiments that illustrate principles of chemical equilibrium.
Inspiring Teaching and Learning Chemistry for 97 Years
The January 2020 issue of the Journal of Chemical Education is now available online to subscribers. Topics featured in this issue include: activities using household materials; demonstrations; health-oriented experiments; microplastics; environmental chemistry labs; fluorescence; surface chemistry; cost-effective equipment; augmented & virtual reality; laboratory curriculum; examining learning in general chemistry; organic chemistry teaching resource; from the archives: developing oral communication skills.
Chemistry and lasers can be used to create a demonstration that includes several colors and flashing lights. This demonstration connects to topics in quantum chemistry and phase changes.
Celebrating National Chemistry Week 2019
The October 2019 issue of the Journal of Chemical Education is now available online to subscribers. Topics featured in this issue include: marvelous metals; safety; engaging activities on nuclear chemistry and self-healing hydrogels; chemistry activities for students studying nursing; fostering community; mathematics and computer models in chemistry; innovative experiments; challenges of demonstrating the atmospheric greenhouse effect; chemical education research; resources for teaching.
Simple chemical tests are described that can indicate the presence of certain metals in coins. A wide variety of chemical concepts are involved. The experiments described are a natural fit for the 2019 National Chemistry Week theme of "Marvelous Metals!"
For dynamic equilibrium, I like to use a physical analogy that pits students against each other in a classroom-wide “snowball” fight. Not only is this activity great for building students’ conceptualization of dynamic equilibrium, it is also really fun!