How does the Clark polarographic O₂ electrode function? A) It measures the magnetic properties of O₂ versus N_2. B) It measures the electrical potential across a Wheatstone bridge. C) It uses O₂ to produce a reduction-oxidation reaction. D) It measures the comparative cooling effect on a heated wire.

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This system typically consists of a platinum cathode and a silver-silver chloride anode . Oxygen molecules diffuse through the sensor membrane into the electrolyte, where a polarizing voltage causes electron flow between the anode and cathode. While silver is oxidized at the anode, the flow of electrons reduces oxygen (and water) to hydroxyl ions (OHF1F1F1S1^F1F1F10) at the cathode. The more O₂ molecules that are reduced, the greater is the electron flow across the poles (current). The resulting change in current is proportional to the PO₂, with its value displayed on a galvanometer, calibrated in percent oxygen.

How Does the Clark Polarographic O2 Electrode Function

How Does the Clark Polarographic O₂ Electrode Function