Electrolysis Practice Exam

The correct answer is that the cathode is referred to as the negative pole in a circuit. In electrolysis and other electrochemical processes, the cathode is the electrode where reduction occurs, meaning it is the site where electrons are gained by the chemical species. This process takes place in an electrolytic cell where the cathode attracts cations (positively charged ions) from the solution, leading to their reduction.

In the context of electrolysis, the negative designation of the cathode is essential because it indicates that it is the source of electrons, which are then used to facilitate the chemical reactions occurring in the electrolyte. Understanding this role of the cathode helps clarify fundamental concepts in electrochemistry and ensures proper functioning in applications such as electroplating and the production of various chemicals through electrolysis.