What is calomel and quinhydrone electrode explaine in detail .

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Calomel electrode is  A reference electrode or half-cell which is made up  of mercury, mercurous chloride and potassium chloride. This is mainly used for measurement of pH.
A calomel electrode is used more effectively than any other electrode for experimental setup at smaller scale due to its easy preparation. The easily preparation is subjected to its less cost, easy availability of chemical as mercury, mercurous chloride and potassium chloride. Most importantly its application in determining the extent of corrosion in various metals makes it a important electrode.Calomel electrode acts as a reference electrode.It consists of a Hg and HgCl2 solution.
Compared to Standard Hydrogen Electrode, the calomel electrode is easy to maintain. Here the paste of HgCl2 and solid Hg is attached to a rod immersed in saturated KCl solution.Saturated solution of KCl allows the exchange of ions through a porous salt bridge, which is used to complete the circuit.​

Quinhydrine electrode :-



 

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Quinhydrine electrode is use as a standard electrode for calculating pH till8.5

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