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A skier’s light-headedness at altitude serves as the phenomenon underlying this lab. The human body is a complex equilibrium system that is constantly changing and constantly working to establish and maintain stability. Students will conduct a series of 3 investigations in which they evaluate a chemical system, make modifications to an established equilibrium, and then utilize what they have learned by applying it to the human body to answer the driving question, “What variables affect a chemical reaction system and how does the system respond when something changes?”
Time Requirement
Total, 190 minutes. Teacher prep, 50 minutes. Pre-lab, 20 minutes. Investigations (3), 120 minutes.
Digital Resources
Includes 1-year access to digital resources that support 3-dimensional instruction for NGSS. Digital resources may include a teacher manual and student guide, pre-lab activities and setup videos, phenomenon videos, simulations, and post-lab analysis and assessments.
Performance Expectation(s)
HS-PS1-5
HS-PS1-6
Crosscutting Concepts
Stability and Change
Disciplinary Core Ideas
PS1.B: Chemical Reactions
Science and Engineering Practices
Constructing Explanations and Designing Solutions
Learning Objectives
Prerequisite Knowledge and Skills
Students should be able to write and balance chemical equations; understand, read, and write chemical dissociation equations; and have a general understanding of acids, bases, pH, and chemical kinetics.
(M)SDS - Acetic Acid, 0.1M
(M)SDS - Iodine Potassium Iodide, 2%
(M)SDS - Sodium Hydroxide, 0.1M
(M)SDS - Starch, 1%
(M)SDS - Dilute Lugol's Solution
(M)SDS - Vinegar
(M)SDS - Bromothymol Blue, 0.04%
Carolina Chemonstrations®: Under Pressure: Sample Teacher's Manual
Carolina ChemKits®:: Chemical Equilibrium: Sample Teacher’s Manual
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