BRAINCAKECalomel Electrode
A calomel electrode can be used instead of a standard hydrogen half cell as a reference electrode. It consists of mercury in contact with a saturated solution of mercury (I) chloride. The calomel electrode has a standard electrode potential of +0.27V.
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Key terms in this lesson
- standard hydrogen electrode
- A reference half cell, assigned an electrode potential of 0.0V by definition, consisting of hydrogen gas at 100kPa bubbled over a platinum electrode in a solution of H+ ions at 1moldm-3.
More in Electrochemistry
- Electrochemical Half Cells
- Electrochemical Cells
- The Standard Hydrogen Half Cell
- Standard Electrode Potential Eθ and the Electrochemical Series
- Standard Cell Potentials Eθcell Values and Electrochemical Cells
- Non-Standard Conditions
- Cell Diagrams
- Thermodynamic Feasibility of a Reaction and the Extent of a Reaction
All 14 lessons in Electrochemistry · All OCR A-level Chemistry topics