Calomel is a mercury chloride mineral with formula Hg2Cl2 (see mercury(I) chloride). The name derives from Greek kalos (beautiful) and melas (black) because it turns black on reaction with ammonia. This was known to alchemists.
How does a calomel electrode work?
Calomel electrode is the mercury-mercurous chloride electrode. It consists of a glass vessel having a bent side tube. ... A platinum wire sealed into a glass tube is dipped into mercury layer is used to provide the external electrical contact. The side tube is used for making electrical contact with a salt bridge.
What is calomel electrode explain how the potential is measurement by this electrode?
Corrosionpedia Explains Calomel Electrode Reference electrodes have a stable and well-known electrode potential and can be used to measure the likelihood of corrosion in various aqueous solutions. ... The aqueous phase in contact with both the calomel and the mercury is a saturated solution of water and potassium chloride.Nov 4, 2020
Why is a calomel electrode used?
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. ... This so-called reference electrode allows control of the potential of a working electrode.
What is used in calomel electrode?
A calomel electrode is a type of reference electrode that is based on reactions between mercury (I) chloride (calomel) and elemental mercury. ... Mercury paste is packed on the innermost tube, with mercurous chloride being dispersed in a saturated potassium chloride solution. Figure 1. Diagram of a calomel electrode.Nov 4, 2020
Which reference electrode is calomel electrode?
A calomel electrode is a type of reference electrode that is based on reactions between mercury (I) chloride (calomel) and elemental mercury. These electrodes are commonly used in used in voltmeters and pH meters.Nov 4, 2020
What is calomel electrode explain in detail?
A calomel electrode is a type of reference electrode that is based on reactions between mercury (I) chloride (calomel) and elemental mercury. These electrodes are commonly used in used in voltmeters and pH meters. ... This permits electrical contact with a solution outside the electrode.Nov 4, 2020
Is calomel a cathode or anode?
Calomel electrode acts both as anode as well as cathode depending upon the electrode or an unknown electrode with which it is coupled with.Apr 29, 2021