Question

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What is CALOMEL ELECTRODE ??

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Answer 1

The Saturated calomel electrode 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.

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Answer 2

Answer:

Calomel electrode is a type of half cell in which the electrode is mercury coated with calomel (Hg2Cl2) and the electrolyte is a solution of potassium chloride and saturated calomel. In the calomel half cell the overall reaction is

Hg2Cl2(s) + 2e- →← 2Hg(l) + 2Cl-

(OR)

A calomel electrode is a reference electrode that is based on reactions between mercury (I) chloride (calomel) and elemental mercury. The aqueous phase in contact with both the calomel and the mercury is a saturated solution of water and potassium chloride. The linking of the electrode is through a porous frit to the solution that contains the other electrode.

Its structure consists of an outer glass tube that is fitted with a frit at the bottom. This permits electrical contact with the solution on the outside. Another tube is fitted on the inside of the first tube. The bottom of this inner tube has glass wool at the bottom to allow for further connection of electricity between the contents of both tubes.

Explanation: