Solution to Chemical Mystery #17: Bubble Buster!
Tom Kuntzleman | Wed, 04/29/2020 - 16:45
The solution to Chemical Mystery #17 is presented. Were you able to use your chemical knowledge to explain the results?
HS-PS1-6 Equilibrium
A Multi-Colored Equilibrium Experiment
Tom Kuntzleman | Thu, 03/05/2020 - 18:35
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.
Why Green Chemistry? Or Better Yet, Why Not Green Chemistry?
Erika Fatura | Mon, 08/05/2019 - 22:50
My top 5 reasons for using Green Chemistry in my classroom along with a few examples of replacement labs that follow Green Chemistry principles.
Equilibrium Snowball Fight
Josh Kenney | Thu, 06/20/2019 - 12:08
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!
Solution to Chemical Mystery #16: A Red, White, and Blue Chemistry Trick for You!
Tom Kuntzleman | Wed, 06/12/2019 - 13:37
The solution to "Chemical Mystery #16: A Red, White, and Blue Chemistry Trick for You!" is presented. How this experiment can be used as a springboard to carry out a simple quantitative analysis of salt solubility is also discussed.
Determination of Citric Acid in Candies
Andrea Amato | Thu, 05/03/2018 - 22:12
Looking to change up your titration lab? Citric acid is very common in candy and other foods. Students will be engaged in using titration to find the amount of the acid in Mentos Now or other candy. Student and teacher documents are provided to help you use the activity with your own students.
Moving Beyond Le Châtelier
Kaleb Underwood | Mon, 12/04/2017 - 11:09
Is it time for us as chemistry teachers to move beyond the Le Châtelier Principle as justification for why disturbances to equilibrium systems cause particular “shifts”? The author shares his new approach to teach equilibrium and provide his students with a more rigorous understanding of the concept.
An Activity to Demonstrate the Principles of Chemical Kinetics and Equilibria
George Parris | Fri, 08/04/2017 - 11:32
A classroom activity to demonstrate the principles of chemical kinetics and equilibria and the utility of the mole concept is described here. The activity involved no hazardous materials or complex equipment and can be enjoyed and appreciated by general studies students as well as chemistry majors.
Silver Plated Bulbs
Deanna Cullen | Mon, 12/19/2016 - 13:16
I have used several different versions of the Silver Mirror or Tollen's Test lab. I am sharing the method that has proven to be the most reliable for me. The solutions should be made fresh, the directions must be followed closely and timing is very important. I like the fact that relatively small amounts of the chemicals are required, but as always you must be vigilant with safety precautions.
Titration of an Esterification Reaction to Determine Equilibrium Constant
Lowell Thomson | Wed, 09/21/2016 - 08:44
This activity was submitted for a 2016 ChemEd X Call for Contributions soliciting input regarding the big ideas being put forth by organizations like AP. The author shares a lab activity that relies on connections - between stoichiometry, esterification, equilibrium, kinetics, titrations and uncertainty of calculations. He also shares the resources he created.