Classroom Resources: Equilibrium
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Solubility, Concentration, Conductivity, Stoichiometry, Equilibrium Constants  High School
Lab: Experimental Determination of the Solubility Product Constant for Calcium Hydroxide
In this lab, students will predict and measure the relationship between the conductivity of a solution of calcium hydroxide and the mass of substance added to it. From the relationship, students will determine solubility and Ksp of calcium hydroxide. Ksp will be calculated using the molar concentration of ions in the solution and the equilibrium expression for the dissociation of calcium hydroxide.

Solubility, Entropy, Le Châtelier's Principle, Gibb's Free Energy , Equilibrium Constants, Enthalpy  High School
Lesson Plan: Relationship Between Free Energy and the Equilibrium Constant
In this lesson, students will explore the relationships between solubility and Keq (specifically Ksp), as well as Keq and ΔG°. First, a guided inquiry activity will introduce the relationship between standard free energy and equilibrium constant with the equation ΔG° = RTlnKeq. Then data collection regarding solubility of potassium nitrate at various temperatures will lead to the calculation of Ksp and ΔGo for the dissolution reaction at those temperatures. Students will manipulate the equations ΔG° = RTlnKeq and ΔG° = ΔH°  TΔS° to derive a linear relationship between 1/T and lnKeq, which will then be graphed to determine values for ΔH° and ΔS°.

Le Châtelier's Principle, Establishing Equilibrium, Equilibrium Constants, Reaction Quotient  High School
Activity: Le Châtelier's Principle Particulate View
In this activity, students will gain a better understanding of how applying a stress to a reaction system will shift the equilibrium. The students will be able to predict the direction a reversible reaction will shift based of the value of the reaction quotient (Q) and the equilibrium constant (K). This activity should be completed after students have completed the activity “Equilibrium Particulate View.”

Establishing Equilibrium, Equilibrium Constants, Reaction Quotient  High School
Activity: Equilibrium Particulate View
In this activity, students will gain a better understanding of what it means for a reaction to be in a state of equilibrium and how a reaction progresses over time to establish equilibrium. Students will also relate the equilibrium constant to the amount of products and reactants present at equilibrium.

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.

Catalysts, Entropy, Equilibrium Constants, Enthalpy, Activation Energy, Energy Diagrams, Reaction Quotient, Spontaneous vs. Nonspontaneous Reactions  High School
Lesson Plan: Making Connections in Kinetics, Equilibrium and Thermochemistry
In this lesson students will understand the connections between the equilibrium constant (K) and the reaction quotient (Q) as well as how they determine the favorability of a reaction. Additionally students will be able to determine if a reaction is kinetically favored or thermodynamically favored.

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.

Le Châtelier's Principle, Equilibrium Constants, Reaction Quotient  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, 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.

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.

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.

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.
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Grade Level: ✖ High School
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