19.3b Cell Notation & Cathodic Protection | General Chemistry

Chad provides a succinct lesson on Cell Notation and Cathodic Protection. In proper cell notation the anode is written on the left and the cathode on the right, just as is done with diagrams for galvanic cells. Two vertical slashes are drawn in between the notation for the anode and cathode to represent the salt bridge, and a single vertical slash is drawn to separate components within each half cell that are in different phases.

Cathodic protection is then described in which iron is made the cathode in a reaction between oxygen and a more active metal (like zinc). This prevents the iron from being oxidized (i.e. prevents corrosion) and has a variety of industrial applications.

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00:00 Lesson Introduction
00:28 Cell Notation for Galvanic Cell Example #1
02:43 Cell Notation for Galvanic Cell with Platinum Electrode
05:00 Cathodic Protection

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