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Reaction Rate – Why Wait?

Reaction Rate – Why Wait?. Lisa Devillez. Chapter by Chapter : Is there a better way?. Standard texts Building foundations through details Working towards the big picture. Understanding the big picture first. Chemistry in Context (ACS) Planted the seed

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Reaction Rate – Why Wait?

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  1. Reaction Rate – Why Wait? Lisa Devillez

  2. Chapter by Chapter : Is there a better way? • Standard texts • Building foundations through details • Working towards the big picture

  3. Understanding the big picture first • Chemistry in Context (ACS) • Planted the seed • Combine foundational concepts with context • Preempts “Why are we learning this?” • Better match with my learning style

  4. Reaction Rate in Core Content SC-HS-1.1.6 Students will: •identify variables that affect reaction rates; •predict effects of changes in variables (concentration, temperature, properties of reactants, surface area and catalysts) based on evidence/data from chemical reactions. Rates of chemical reactions vary. Reaction rates depend on concentration, temperature and properties of reactants. Catalysts speed up chemical reactions. DOK 3

  5. Reaction Rate Up Front: Why it Works • Provides a context for foundational concepts • Particle nature of matter ↔ Collision Theory • Physical Change ↔ Chemical Change • Intro to Nomenclature and Models • Endothermic vs. Exothermic

  6. Reaction Rate Up Front: Why it Works • Innocuous Labs • Vinegar and Baking Soda • Decomposition of H2O2 • Easily adapted for inquiry • Opportunities for data collection and analysis

  7. Reaction Rate Up Front: Why it Works • Real World Applications • Catalysts (Fuel cells, Grubbs catalyst) • Catalytic Converters • Ozone Layer Depletion • Enzymes

  8. An extra benefit

  9. Putting It All Together: Unit Objectives • Be able to relate the collision model to variables and their effect on reaction rate. • Explain graphically the concept of reaction rate. Use an energy diagram to determine the thermodynamics of a reaction (endothermic vs. exothermic, ∆E, activation energy)

  10. Unit Objectives (continued) • Describe the theory of how a catalyst works. Apply this theory to the function of the catalytic converter in your car. • Understand the role of enzymes in biological reactions. • Understand the role of catalysts in depletion of the ozone layer

  11. Unit Resources • www.kyscience.pbworks.com

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