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Equilibrium/Le Chatelier’s Principle

Equilibrium/Le Chatelier’s Principle
Contributors
Beyond Benign, Inc.
Retired K-12 Educator | Beyond Benign, Inc.
Fostering Learners + Leaders in Sustainable STEM | Science Done Sustainably
Beyond Benign, Inc.
Learning Objets
Summary
Green chemistry principles emphasize the importance of sustainability in chemical processes and aim to reduce the environmental impact of chemistry. One way to apply these principles is by using equilibrium experiments and Le Chatelier's Principle with environmentally friendly reagents that are minimally toxic. In the past, these principles have been demonstrated using chemicals that change color as the equilibrium position shifts. However, there are now several green reagents available that can be used instead
File (PDF, PPT, image, etc)
Digital Object Identifier (DOI)
https://doi.org/10.59877/JGET5365
Learning Goals/Student Objectives
Students will:
• Explain the concept of chemical equilibrium
• Distinguish between static and dynamic equilibrium
• Understand Le Chatelier’s Principle
• Describe how to set up an experiment that is in chemical equilibrium
• Predict the effect of adding a stress to the system at equilibrium
Object Type
Laboratory experiment
Audience
High School (Secondary School)
Common pedagogies covered
Hands-on learning
Green Chemistry Principles
Less Hazardous Chemical Syntheses
Designing Safer Chemicals
Use of Renewable Feedstocks
Real-Time Pollution Prevention
Safer Chemistry for Accident Prevention
Safety Precautions, Hazards, and Risk Assessment
Safety Information:
• Safety glasses should be worn whenever working in the lab.
• Iodine is a minor eye irritant, and vinegar and ammonia can cause skin irritation. Individuals with sensitive skin should wear gloves.

Disposal:
• Acids/bases should be neutralized before disposal.
• Materials are safe to go down the drain.
• Always follow state and district rules for discarding laboratory materials.
NGSS Standards, if applicable
• HS-PS1-6. Refine the design of a chemical system by specifying a change in conditions that would produce increased amounts of products at equilibrium.

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Moderation state
Published
Time required (if applicable)
One x 45-minute class period
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