14.3 Voltaic vs Electrolytic Cells | High School Chemistry

Chad provides a comprehensive lesson comparing and contrasting Voltaic Cells (a.k.a Galvanic Cells) and Electrolytic Cells. They are compared and contrasted in terms of spontaneity, the production/consumption of electricity (i.e. current), the flow of electrons between the electrodes and the signs of the relative potentials on the anode and cathode. The incorporation of a salt bridge in voltaic cells as well as the reason for its necessity is also covered. A brief overview of how two specific batteries, the lead storage battery and the hydrogen fuel cell, work is also included. The lesson concludes with a description of how to quickly and easily predict the products of the molten electrolysis of binary salts.

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00:00 Lesson Introduction
00:36 Overview of Voltaic vs Electrolytic Cells
03:02 Anodes and Cathodes
09:30 Anatomy of a Voltaic Cell
15:21 Anatomy of an Electrolytic Cell
20:55 Lead Storage Battery
24:31 Hydrogen Fuel Cell
27:07 Molten Electrolysis

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