Electrolysis

In a galvanic cell, a redox reaction occurs to produce electricity.

In an electrolytic cell, electricity is used to produce a redox reaction that would otherwise be non-spontaneous.

Galvanic Cell

Electrolytic Cell

Electrons are forced to flow in the opposite direction to what they would spontaneously flow.

Because the electron flow is opposite, the anode and cathode are reversed as well as the flow of ions through the salt bridge.

Galvanic Cell

Electrolytic Cell

Uses of Electrolysis

Electrolysis is used to:commercially produce aluminum metalpurify other metals, such as Cu, Fe, Znmetal plating of tin on “tin” cans, and

chrome on steel car bumpers