Question

Consider the following voltaic cell:(d) At which electrode are electrons consumed?

Answer 1

Electrons are consumed at the cathode.

Cathode

the cathode is referred to as the electrode where reduction takes place. In an electrochemical cell, this is typical. Here, the cathode is negative because the cell's electrical energy supply causes chemical molecules to break down. It can, however, also be advantageous, as in a galvanic cell, where a chemical reaction results in the production of electrical energy.

A cathode is often referred to as a hot cathode or a cold cathode. A hot cathode is one that has been heated by a filament in order to emit electrons by thermionic emission, as opposed to a cold cathode, which has not been heated by a filament. If a cathode emits more electrons than those produced by thermionic emission alone, it is typically labeled as "cold."

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