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The calomel electrode is the mercury-mercurous chloride electrode. It consists of a glass vessel having a bent side tube. Pure mercury is placed at the bottom of the tube, which is covered with a paste of mercury- mercurous chloride (Hg + Hg 2 Cl 2) that is calomel.
Calomel electrode is a metal-sparingly soluble salt electrode. It is used as secondary reference electrode to determine the standard potentials of the electrode.
Oct 26, 2022 · Calomel Electrodes. A calomel reference electrode is based on the following redox couple between Hg 2 Cl 2 and Hg (calomel is the common name for Hg 2 Cl 2) Hg2Cl2(s) + 2e− ⇌ 2Hg(l) + 2Cl−(aq) H g 2 C l 2 ( s) + 2 e − ⇌ 2 H g ( l) + 2 C l − ( a q) for which the potential is.
The saturated calomel electrode (SCE) is a reference electrode based on the reaction between elemental mercury and mercury (I) chloride. It has been widely replaced by the silver chloride electrode, however the calomel electrode has a reputation of being more robust.
The calomel electrode finds applications in pH measurements, electrochemical analysis, environmental monitoring, and electroplating/electrorefining processes.
Mar 30, 2023 · A calomel electrode is a type of reference electrode used in electrochemical measurements to establish a stable reference potential. The calomel electrode is made up of a mercury-mercurous chloride (Hg/Hg2Cl2) electrode in contact with a solution of potassium chloride (KCl). It can be represented as:
Aug 29, 2023 · Most potentiometric methods employ one of two other common reference half-cells – the saturated calomel electrode (SCE) or the silver-silver chloride electrode (Ag/AgCl).
Calomel electrode is one of the reference electrodes used to find electrode potential of other electrodes and also in pH and potential measurements etc. Calomel electrode consists of mercury as the electrode and mercurous chloride as the electrolyte.
Calomel is used as the interface between metallic mercury and a chloride solution in a saturated calomel electrode, which is used in electrochemistry to measure pH and electrical potentials in solutions.
A second common reference electrode is the saturated calomel electrode (SCE), which has the same general form as the silver–silver chloride electrode. The SCE consists of a platinum wire inserted into a moist paste of liquid mercury (Hg 2 Cl 2; called calomel in the old chemical literature) and KCl.
