A three-electrode system is used in lab experiments so that
A) load is divided evenly between all electrodes
B) potential change across working electrode can be controlled
C) potential at the counter electrode is fixed
D) current at the working electrode is fixed

Question

Quizplus · Accepted Answer

In a three-electrode system, the potential change across the working electrode can be controlled by adjusting the potential at the reference electrode. The counter electrode is used to complete the circuit and does not play a role in controlling the potential at the working electrode. The current at the working electrode is not necessarily fixed, but can be controlled by adjusting the potential and/or concentration of the electrolyte. Therefore, B is the best choice.

A Three-Electrode System Is Used in Lab Experiments So That