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Thinking Like a Chemist About Electrochemistry e - on the move UNIT - - PowerPoint PPT Presentation
Thinking Like a Chemist About Electrochemistry e - on the move UNIT - - PowerPoint PPT Presentation
Thinking Like a Chemist About Electrochemistry e - on the move UNIT 8 DAY 3 What are we going to learn today? Oxidation Reduction Chemistry Voltaic and Electrolytic Cells Tracking the movement of electrons Quantifying the Voltage Quiz:
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- 1. The following is a sketch of a voltaic
- cell. In which direction will the sulfate
anions flow?
- A. Toward the anode
- B. Toward the cathode
- C. Depends, could go either way to
balance charge
- 2. Is it possible for the “counter
ions” to flow through the external wire to balance the charge?
- A. Yes
- B. No
Quiz: Clicker Question
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What is your major?
- A. Engineering
- B. Biology
- C. Chemistry
- D. Other
Poll: Clicker Question
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While setting up next demo
Watch this video snippet……
http://www.learner.org/resources/series26.html?pop=yes&pid=76
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Macroscopic Look Conversion of Chemical Energy to Electrical Energy - Electrochemistry
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Battery/Potato Clock/Electrochemical Cell
What do these things have in common?
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Potato Clock
Competition Biology vs Chemistry vs Engineering vs Others
- 1. get potato clock to work
- 2. explain why/how it works
Where does the energy comes from to power the clock?
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Use the chart to explain the Potato clock: Movement of electrons and What is acting as anode and What is acting as a cathode.
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What goes in the blanks for potato clock cell? A) Zn, Zn2+, Cu2+,Cu, extra needs to be deleted B) Zn2+, Zn, Cu, Cu2+, extra needs to be deleted C) Zn, Zn2+, H+, H2, Cu D) Zn, Zn2+, Cu2+, Cu, H+, H2 E) Zn, Zn2+, H2, H+
, Cu
Zn H+
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Battery/Potato Clock/Electrochemical Cell
What do these things have in common?
- A. convert chemical energy to electrical energy
- B. measurable voltage
- C. capable of going “dead”
- D. all of the above
Poll: Clicker Question
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Zn H+
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CH302 Vanden Bout/LaBrake Spring 2012
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CH302 Vanden Bout/LaBrake Spring 2012
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CH302 Vanden Bout/LaBrake Spring 2012
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CH302 Vanden Bout/LaBrake Spring 2012
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IF: Zn Zn2+ + 2e- E° = 0.76V THEN: Zn2+ + 2e- Zn E° = ?
- A. -0.76 V
- B. 0.76 V
- C. 0 V
- D. It can’t be measured.
Poll: Clicker Question
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