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What is the formula for calomel?
The chemical formula for calomel is Hg2Cl2, where Hg represents mercury and Cl represents chlorine.
What are the uses of calomel electrodes?
The calomel electrodes are usually used as the salt bridge.
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.
Where to purchase calomel?
black market
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.
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 electrode potential of calomel electrode?
246 mV
Is calomel ionic or covalent?
Calomel is mercury(I) chloride (mercurous chloride). It is ionic and contains the Hg22+ ion and the Cl- ion.
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
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.
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
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.
