Review section 4.4 of the textbook, especially the Oxidation numbers rules on page 137.
Chemistry is an experimental science where measurements are made. The theories and equations we see in the text are backed up by experimental results. The following example in the video below helped shape Electrochemistry.
20.1 Electrochemistry Observations
Electrochemistry is the study of chemical and electrical energy. The two processes we will discuss are the generation of an electrical current from a chemical (redox) reaction (this is a spontaneous process) and the use of an electric current to produce a chemical change (a nonspontaneous process).
20.1 Electrochemistry
Now that we have observed various electrochemical processes, we need a convention to describe each voltaic cell.
20.3 Silver-Copper Voltaic Cell Part 1
20.3 Silver-Copper Voltaic Cell Part 2
20.3 Silver-Iron Voltaic Cell
When you describe voltaic cells, be sure to keep a few things in mind:
*When a half reaction is reversed, the sign of the standard cell potential is reversed.
*The standard cell potential is an intensive property.
*To run spontaneously, the standard cell potential must be positive.
*A chemically inert conductor is required if none of the substances participating in the half reaction is a conducting solid.
20.3 Voltaic Cells
Mastering Chemistry Tutorial Question:
•Animation – Analysis of a Copper-Zinc Voltaic Cell
Mastering Chemistry Tutorial Question:
•A Nickel – Aluminum Galvanic Cell
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