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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.
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.
Calomel electrode is a metal-sparingly soluble salt electrode. It is used as secondary reference electrode to determine the standard potentials of the electrode. Construction : The electrode consists of a glass tube provided with a bent side tube and another side tube B .
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.
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 · Saturated Calomel Electrode (SCE) The SCE is a half cell composed of mercurous chloride (Hg2Cl2, calomel) in contact with a mercury pool. These components are either layered under a saturated solution of potassium chloride (KCl) or within a fritted compartment surrounded by the saturated KCl solution (called a double-junction arrangement).
One such reference electrode is the calomel electrode, also known as the saturated calomel electrode (SCE). It has been widely used in various applications, ranging from pH measurements to electrochemical analysis.
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. In most electrochemical measurements, it is necessary to keep one of the electrodes in an electrochemical cell at a constant potential.
May 9, 2021 · 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.
Jan 1, 2009 · By using reference electrodes such as the calomel electrode or the silver/silver chloride electrode with aqueous reference electrolyte solutions, an unknown liquid-junction potential is introduced into the measurements.
