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Olwen Needham-Brooks, Bushra Anwar, Daniel Fiorella , Scott Jaspers- Fayer

ELECTROCHEMISTRY SCH4U. Olwen Needham-Brooks, Bushra Anwar, Daniel Fiorella , Scott Jaspers- Fayer. Big Ideas. Oxidation and reduction are paired chemical reactions in which electrons are transferred from one substance to another in a particular way.

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Olwen Needham-Brooks, Bushra Anwar, Daniel Fiorella , Scott Jaspers- Fayer

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  1. ELECTROCHEMISTRY SCH4U Olwen Needham-Brooks, Bushra Anwar,Daniel Fiorella, Scott Jaspers-Fayer

  2. Big Ideas • Oxidation and reduction are paired chemical reactions in which electrons are transferred from one substance to another in a particular way. • The control and application of oxidation and reduction reactions have significant implications for industry health and safety and the environment.

  3. Overarching Question • How do oxidation-reduction reactions, which are the basis of electrochemical cells, impact our economy, society and environment?

  4. Guiding questions • What are oxidation-reduction reactions and how are they characterized? • How do oxidation-reduction reactions apply to electrochemical cells? • What are the applications of galvanic and electrolytic cells? • What are some of the pros and cons of electrochemical technologies?

  5. Unit plan

  6. Misconceptions • Reduction and oxidation reactions can occur in isolation. • Free electrons flow through the salt bridge or electrolyte solutions to complete the circuit in a cell. • The anode must appear on the left in a galvanic cell diagram. • Oxidation numbers represent an ionic charge in a covalent molecule or polyatomic atom. • Cell potential changes when the volume of the solution in the cell changes, or when the reaction equation is reversed or multiplied by a numerical coefficient.

  7. Activity 1 • 4 groups are needed • Group is provided with a number of slips of paper with steps written on them • Group must figure out which steps are relating to the oxidation number method vs. half reaction method and put them in the correct order • Group must then balance the given equation using one of the methods for practice on provided chart paper

  8. Activity 2 • The class is divided into five groups. • Each group is provided with a visual representation of an electrochemical technology and related questions. • Students are given 10 -15 minutes to examine the visuals and answer the questions. • Each group will present the reactions, applications and drawbacks (if any) of their assigned electrochemical technology (using their answers of questions). • Presentation can be in the form of a debate, news report, panel discussion, etc.

  9. STSE Blog • www.electrochemistry12.blogspot.com • Each student is required to create two blog entries over the course of the unit. • Blog entry#1: An example of a redox reaction from everyday life • Blog entry#2: An issue pertaining to an electrochemical technology • Each student is also required to comment on two other blog entries#2.

  10. Questions or Comments

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