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Unlocking Reaction Rate: Building Foundations in Chemistry

This chapter delves into the intricacies of reaction rate, examining the factors influencing it such as concentration, temperature, and catalysts. Through engaging examples and real-world applications, students explore the collision theory and the particle nature of matter. The material is presented in a contextualized manner, enabling students to grasp the big picture before diving into details. Emphasis is placed on combining foundational concepts with practical context to enhance understanding and retention. With a focus on inquiry-based learning, students predict and analyze the effects of changes in variables on reaction rates. By the end of the unit, students will be able to explain catalytic processes, differentiate between endothermic and exothermic reactions, and relate these concepts to real-world scenarios like catalytic converters and ozone layer depletion.

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Unlocking Reaction Rate: Building Foundations in Chemistry

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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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