Equilibrium Systems

Physics stars design mobiles that demonstrate rotational equilibrium. They take measurements and solve related equations for force by graphing, substitution, or determinants. This is a well-developed lesson plan, complete with student...

Take scientists beyond our earthly reach and into the solar system. Pupils create a model of the solar system and discuss strengths and weaknesses of their model. They calculate distances in light years, discuss the nebular theory, and...

The best part of learning about equilibrium is that nothing changes. Young chemists observe four demonstrations during this lesson: equilibrium in a saturated solution, equilibrium with an acid-base indicator, equilibrium with cobalt...

Henri-Louis Le Chatelier wrote many papers throughout his 85-year life, but he is remembered for one of his earliest discoveries, now known as Le Chatelier's Principle. The final lesson in an 11-part series encourages young chemists to...

Would you believe that your digestive system stretches to five times your height?! Help your pupils to understand this relationship as they work through the laboratory exercise. The first instructional activity of a 12-part series is a...

Time to shake up the status quo with a presentation that describes Le Chatlier's Principle and has pupils examine situations in which equilibrium is upset. Four examples show different stresses to the reaction and the resulting shift. 

The equilibrium constant does not change — as long as the temperature remains unchanged. Here's presentation that briefly reviews equilibrium constants  before working through four practice problems, including three calculating the Keq...

Students determine an equilibrium constant using a spectrophotometer. In this equilibrium lesson plan, students calibrate a spectrophotometer with 5 solutions in order to prepare the spectrophotometer for the experiment. Students measure...

Sometimes equilibrium is a difficult concept for a beginning chemist to grasp. Here is a demonstration that helps them to visualize what is happening at a molecular level. Using two aquariums and different sizes of beakers to transfer...

By watching this droll and delightful animation, physical scientists consider what happens when molecules collide. In this film, however, parodic people bump into each other, exchanging limbs in the process, just as molecules might trade...