Which type of potential is indicated by cell potential in a galvanic cell?

In a galvanic cell, the cell potential reflects the ability of the cell to drive an electrochemical reaction and is directly related to the reduction potentials of the half-reactions involved. The cell potential (often represented as E°cell) is calculated by taking the difference between the reduction potentials of the cathode and the anode.

The correct answer identifies that the type of potential indicated by cell potential in a galvanic cell is the reduction potential, which is a measure of the tendency of a species to gain electrons and thereby be reduced. In essence, a higher reduction potential indicates a greater likelihood of a species to be reduced, contributing to the overall cell potential when coupled with an oxidation half-reaction.

In this context, focusing on reduction potentials is vital because the functioning of a galvanic cell hinges on the reduction of one species and the oxidation of another. This interplay creates a flow of electrons through an external circuit, which is what generates electrical energy. Understanding this concept is central to mastering the principles of electrochemistry and galvanic cells.