The oxygen electrode is designed as a complete electrochemical cell which includes a platinum cathode at which oxygen is ______ by the reaction ______, utilizing electrons produced at the anode.

Question

Quizplus · Accepted Answer

In the oxygen electrode cell, the silver/silver chloride electrode serves as the anode, producing electrons by the oxidation reaction Agᵒ↔ Ag⁺ + e⁻.These electrons are consumed by the reduction of oxygen at the platinum cathode by the reaction O₂ + 2H⁺ + 2e⁻ → H₂O₂.The current generated at the platinum electrode is directly proportional to the concentration of oxygen dissolved in the sample.

The Oxygen Electrode Is Designed as a Complete Electrochemical Cell