Classroom Resources: Equilibrium

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• Le Châtelier's Principle, Establishing Equilibrium | High School

Lab: A Greener Le Châtelier’s Principle Lab

In this lab, students will explore Le Châtelier’s Principle using non-toxic materials, while still visualizing the equilibrium shifts through color changes. Traditionally, equilibrium experiments and Le Châtelier’s Principle are illustrated using chemicals that undergo color changes as the equilibrium position shifts such as cobalt (IV) chloride and iron (III) thiocyanate. While these reactions effectively demonstrate Le Châtelier’s Principle, they utilize reagents that are toxic.

• Le Châtelier's Principle, Establishing Equilibrium | High School

Simulation: Predicting Shifts in Equilibrium: Q vs K

In this simulation, students will take a 15 question quiz. Each quiz question has two parts. The first part requires the student to calculate the value of the reaction quotient, Q. In the second portion of the question, the students will compare the value of Q to the equilibrium constant, K, and predict which way the reaction will shift to reach equilibrium. The simulation includes five different reactions which each have three scenarios: Q > K, Q = K, and Q < K.

• Le Châtelier's Principle, Establishing Equilibrium, Equilibrium Constants, Reaction Quotient | High School

Lesson Plan: Equilibrium Unit Plan

The AACT high school classroom resource library and multimedia collection has everything you need to put together a unit plan for your classroom: lessons, activities, labs, projects, videos, simulations, and animations. We constructed a unit plan using AACT resources that is designed to teach equilibrium to your students.

• Le Châtelier's Principle, Equilibrium Constants | High School

Activity: Equilibrium in a Beaker

In this activity, students will model equilibrium reactions using plastic chips to represent atoms. The goal of the lesson is to connect the symbolic model of an equilibrium reaction to its particle model.

• Le Châtelier's Principle, Equilibrium Constants, Reaction Quotient | High School

Lesson Plan: Q, K, and Le Chatelier

In this lesson students practice applying Q vs K as an explanatory tool in a simulation and demonstration. In both activities, students will consider how a change in concentration of one species subsequently effects all the species as equilibrium is reestablished.

• Reaction Rate, Exothermic & Endothermic, Le Châtelier's Principle, Hess's Law, Activation Energy | High School

Lab: Kinetics and Equilibrium

In this lab, students will investigate the reaction of the hydrogen sulfite ion (HSO3-) and the iodate ion (IO3-) to determine the effect that changing concentration and temperature has on the reaction rate.

• Le Châtelier's Principle, Establishing Equilibrium, Equilibrium Constants, Reaction Quotient | High School

Lesson Plan: Discovering Equilibrium

In this lesson students manipulate sets of given conditions to discover what equilibrium is, and how the equilibrium is established from different starting conditions. Students then refer back to the activity as the foundation framework for the rest of Essential Knowledge 6.A, 6.B.1 and 6.B.2. This lesson focuses on both a qualitative and quantitative understanding of equilibrium.

• Le Châtelier's Principle, Establishing Equilibrium | High School

Activity: Simulation Activity: Predicting Shifts in Equilibrium: Q vs K

In this simulation, students will take a 15 question quiz. Each quiz questions has two parts. The first part requires the student to calculate the value of the reaction quotient, Q. In the second portion of the question, the students will compare the value of Q to the equilibrium constant, K, and predict which way the reaction will shift to reach equilibrium. The simulation includes five different reactions which each have three scenarios: Q > K, Q = K, and Q < K.

• Concentration, Reversible Reactions, Le Châtelier's Principle | High School

Lab: Le Chatelier’s Soda

In this lab, students will observe how the equilibrium of a chemical reaction is affected when a change in pressure, temperature, and concentration is applied to the system.

• Observations, Chemical Change, Chemical Change, Reaction Rate, Acid Base Reactions, Limiting Reactant, Chemical Change, Indicators, Le Châtelier's Principle | High School

Demonstration: Milk of Magnesia Magic

In this demonstration, students will observe a color change in a milk of magnesia solution as vinegar is added.

• Heat, Temperature, Exothermic & Endothermic, Activation Energy, Le Châtelier's Principle, Establishing Equilibrium, Equilibrium Constants, Reaction Quotient | High School

Activity: Reversible Reactions Simulation

In this activity, students will investigate how temperature, activation energy, initial amounts of products and reactants, and type of reaction (exo- or endothermic) effect the equilibrium position of a reaction using a simulation.

• Heat, Temperature, Exothermic & Endothermic, Le Châtelier's Principle, Establishing Equilibrium, Equilibrium Constants, Reaction Quotient | High School

Demonstration: Le Châtelier’s Principle

In this demonstration, students will witness a system at equilibrium and apply different stresses to see how the equilibrium shifts.

• Reaction Rate, Reversible Reactions, Le Châtelier's Principle, Establishing Equilibrium, Equilibrium Constants, Graphing | High School

Lab: Dynamic Equilibrium Simulation

In this lab, students will explore equilibrium using paper clips to mimic a chemical reaction.