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National Aeronautics and Space Administration OXYGEN GENERATOR SYSTEM The Math and Science @ Work Lab Activity, A Breath of Fresh Air, may be used as a preparatory activity with this problem. Instructional Objectives Students will • write balanced equations for half reactions; • predict direction of oxidation-reduction reactions; and • determine mass and volume relationship with an emphasis on mole concepts. Degree of Difficulty This problem requires students to integrate several aspects of the AP Chemistry curriculum to obtain the solution. For the average AP Chemistry student, the problem may be moderately difficult. Class Time Required This problem requires 40-55 minutes. • Introduction: 5-10 minutes • Student Work Time: 25-30 minutes • Post Discussion: 10-15 minutes Background This problem is part of a series of activities that applies Math and Science @ Work in NASA’s scientific labs. The International Space Station (ISS) is a research laboratory being assembled in low Earth orbit. Construction of the ISS began in 1998 and is scheduled for completion in 2011. Crews aboard the ISS conduct experiments in biology, chemistry, physics, medicine and physiology, as well as in astronomical and meteorological observations. The microgravity environment of space makes the ISS a unique laboratory for the testing of spacecraft systems that will be required for future exploration missions beyond low Earth orbit. The ISS travels in orbit around the Earth at an average speed of 27,743.8 km/h (17,239.2 mph), completing 15.7 orbits per day. The ISS is Grade Level 11-12 Key Topic Stoichiometry Electrochemistry Oxidation-Reduction Degree of Difficulty Moderate Teacher Prep Time 5-10 minutes Class Time Required 45-60 minutes Technology Calculator -------------------------------- AP Course Topics Reactions: - Reaction Types - Stoichiometry NSES Science Standards - Unifying Concepts and Processes - Physical Science - Science in Personal and Social Perspectives - History and Nature of Science *AP is a trademark owned by the College Board, which was not involved in the production of, and does not endorse, this product. www.nasa.gov Oxygen Generator System 1/5PDF Image | OXYGEN GENERATOR SYSTEM
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