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How is the potential of the calomel electrode kept constant in potentimetre?
In a potentiometer, the potential of the calomel electrode is kept constant by maintaining a saturated solution of potassium chloride in contact with the calomel electrode. This ensures that the electrode potential remains stable, as the concentration of chloride ions remains unchanged. Additionally, the use of a reference electrode, like the calomel electrode, provides a reliable and reproducible potential for accurate measurements in electrochemical experiments. Proper maintenance of temperature and avoiding contamination further help in keeping the potential stable.
Why mercury placed at the bottom of calomel electrode?
Mercury is placed at the bottom of a calomel electrode to provide a stable and well-defined interface between the electrode and the electrolyte solution. This helps to maintain a consistent potential at the electrode/solution interface, making it a reliable reference electrode in electrochemical measurements.
Why calomel electrode dip into kcl solution after the use?
The calomel electrode is dipped into a KCl solution to replenish the potassium chloride at its surface and maintain a stable electrolyte environment. This helps to ensure the proper functioning of the electrode and accurate measurement of the potential.
Describe the construction of calomel electrode?
It consists of tube in the bottom of which is a layer of mercury ,over which is placed a paste of Hg+HgCl2.The remaining portion of cell is filled with a solution of normal or decinormal or saturated solution of KCl. a platinum wire dipping into the mercury layer is used for making electrical contact. the side tube is used for electrode is formulated as;Hg,Hg2Cl2,KCl. the electrode can be coupled with the hydrogen electrode of unknown pH.
What is the half reaction of a saturated calomel electrode?
The half reaction of a saturated calomel electrode is Hg2Cl2(s) 2e- - 2Hg(l) 2Cl-
What is a good substitute for a saturated calomel electrode?
For example, the silver/silver chloride electrode (without mercury).
What is the advantages of calomel electrode?
It cannot be used above 50 degree because the Hg2Cl2 breaks down,yielding an unstable readings. Mercurous chloride used in calomel electrode is a toxic substance
What is the dis advantages of calomel electrode?
It cannot be used above 50 degree because the Hg2Cl2 breaks down,yielding an unstable readings. Mercurous chloride used in calomel electrode is a toxic substance
What has the author Walter Fieldhouse Clarke written?
Walter Fieldhouse Clarke has written: 'I. A study of the hydrogen electrode, of the calomel electrode and of contact potential. II. A study of the ethylene electrode. III. Studies in oxidation and reduction ..' -- subject(s): Accessible book, Electrolysis
What is primary standard electrode?
A primary standard electrode is a reference electrode with a known and stable electrochemical potential that is used as a standard for calibrating other electrodes. These electrodes provide a precise and reproducible reference potential for accurate measurements in electrochemical experiments. Examples include the saturated calomel electrode (SCE) and the silver/silver chloride electrode.
What is electrode potential-?
Electrode potential is the voltage that an electrode is at. This has to be measured versus a reference electrode
Is Standard Calomel Electrode can act as cathode?
Yes, the Standard Calomel Electrode (SCE) can act as a cathode in certain electrochemical cells. When connected to a suitable anode in a galvanic cell or connected to a positive terminal in an electrolytic cell, the SCE can gain electrons and undergo reduction at its surface.
