Kotz and Triechel, Chemistry and Chemical Reactivity Chapter 19: Sections 1-3.
- 19.1 In oxidation-reduction reactions, we can break the reaction into its oxidation component and its reduction component, and account for the transfer of electrons in each "half-reaction". This method allows us to balance the overall reaction, since the net exchange of electrons must not introduce or lose electrons.
- 19.2 In a simple voltaic cell, two half-cells contain the oxidation and reduction reactions respectively, but the ions produced can move freely from one cell to the other through a connector (often a salt bridge or semi-permeable membrane). Metal electrodes carry the current through the remaining segment of the circuit. The electrodes may or may not participate in the reactions by supplying electrons or ions to the system.
- The electrode at which oxidation occurs is the anode (note both terms start with vowels).
- The electrode at which reduction occurs is the cathode (note both terms start with consonants).
- 19.3 Commercial voltaic cells include all common household batteries. Primary batteries are dry cells and alkaline batteries that cannot be recharged after they are discharged. Secondary batteries such as those used in cars and most electronic devices can be recharged by reversing the flow of electrons through the battery.
If you find these study methods useful, visit the Chapter 19 resources at Cengage "Brain" companion site for our text. Click on the chapter dropdown and select Chapter 19 to use the flashcards and glossary.
Use the MindTap reader version of the textbook to view videos and test your understanding with interactive checkpoints. Check OWLv2 for your homework problems.
Videos for Chapter 19: Principles of Chemical Reactivity: Entropy and Free Energy
Review the Videos at Thinkwell Video Lessons.
- Under "ELECTROCHEMISTRY"
- Principles of Electrochemistry
- Reviewing Oxidation-Reduction Reactions
- Galvanic Cells
- Electrochemical Cells
- Electromotive Force
Homework problems: See your Moodle assignment!
AP LAB #16 GUIDED INQUIRY — — Building an Electrochemical cell — Phase I
Identify target battery cell criteria, then design a chemical (wet) battery cells, noting all materials required. You will build the cell and calibrate its output in the next phase, then use your batteries (or commercial batteries) to observe the results of electrolysis on common molecules and rank results.
- AP2009 20 Determination of Electrochemical Series
- AP2009 21 Measurements using electrochemical cells and electroplating
- IGHCE Lab 16.1 OR HSCKM X-1 Produce Hydrogen and Oxygen by Electrolysis of Water
- IGHCE Lab 16.2 OR HSCKM X-2 Observe the Electrochemical Oxidation of Iron
- IGHCE Lab 16.3 OR HSCKM X-3 Measure Electrode Potentials
- IGHCE Lab 16.4 Observe Energy Transformation
- IGHCE Lab 16.5 OR HSCKM X-4 Build a Voltaic Cell
- IGHCE Lab 16.6 Build a Battery
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