n a voltaic cell,______ the electrons and is oxidized, while the_______ electrons and is reduced.
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Chemistry Supplemental Modules (Analytical Chemistry) Electrochemistry Expand/collapse global location
Electrolytic Cells
Last updatedMay 11, 2019
Standard Electrodes
Electrolysis
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Voltaic cells are driven by a spontaneous chemical reaction that produces an electric current through an outside circuit. These cells are important because they are the basis for the batteries that fuel modern society. But they are not the only kind of electrochemical cell. The reverse reaction in each case is non-spontaneous and requires electrical energy to occur.
Introduction
The general form of the reaction can be written as:
Reactants⇌Products+Electrical EnergySpontaneous⟶⟵Non spontaneous(1)
It is possible to construct a cell that does work on a chemical system by driving an electric current through the system. These cells are called electrolytic cells. Electrolytic cells, like galvanic cells, are composed of two half-cells--one is a reduction half-cell, the other is an oxidation half-cell. The direction of electron flow in electrolytic cells, however, may be reversed from the direction of spontaneous electron flow in galvanic cells, but the definition of both cathode and anode remain the same, where reduction takes place at the cathode and oxidation occurs at the anode. Because the directions of both half-reactions have been reversed, the sign, but not the magnitude, of the cell potential has been reversed.
Electrolytic cells are very similar to voltaic (galvanic) cells in the sense that both require a salt bridge, both have a cathode and anode side, and both have a consistent flow of electrons from the anode to the cathode. However, there are also striking differences between the two cells. The main differences are outlined below:
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Answer:
Explanation:
Donate the electrons and induce
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