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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 alkali metals have more negative electrode potential?

Alkali metals have more negative electrode potential because they have a strong tendency to lose electrons, making it easier for them to be oxidized at the electrode surface. This electron-donating tendency results in a more negative electrode potential compared to other elements.


What is a secondary reference electrode?

The primary reference electrode is the hydrogen electrode, which is rather fiddly to work with. Secondary references are chosen for their stability and their reliable potentials so others can be calibrated against them.


How are standard electrode potentials listed in the Standard Reduction Potentials table?

Standard electrode potentials are listed in the table in decreasing order, with the strongest reducing agents (highest standard reduction potentials) at the top and the strongest oxidizing agents (lowest standard reduction potentials) at the bottom. The potentials are measured relative to the standard hydrogen electrode.


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.

Related Questions

Which is the electrode is the anode in a galvanic cell?

The electrode with the highest oxidation potential


What is electrode potential-?

Electrode potential is the voltage that an electrode is at. This has to be measured versus a reference electrode


What metal has the highest negative potential?

The metal with the highest negative potential is Francium. It is located at the bottom of Group 1 in the periodic table, making it the most reactive alkali metal with the most negative standard electrode potential.


Advantages of the Standard electrode potential?

Standard electrode potential is a redox electrode. This is the forms the basis of the thermodynamic scale.


What is the explanation for the origin of single electrode potential?

The single electrode potential comes from electrodes.


What is electrode potential of calomel electrode?

246 mV


State the relation between reduction electrode potential of metal electrode and its tendency towards corrosion?

When the reduction electrode potential of the metal electrode increases there will be a tendency towards corrosion.


What is a reference electrode?

A reference electrode is a stable electrochemical electrode with a known and constant electrode potential. It is used as a comparison point in electrochemical measurements to determine the potential of another electrode in a cell. Reference electrodes help provide accurate and reliable measurements in various electrochemical processes.


Why alkali metals have more negative electrode potential?

Alkali metals have more negative electrode potential because they have a strong tendency to lose electrons, making it easier for them to be oxidized at the electrode surface. This electron-donating tendency results in a more negative electrode potential compared to other elements.


What is the purpose of the reference electrode?

A reference electrode is an electrode with a well-known electrode potential. Its main function is to serve as a half cell to build an electrochemical cell.


What is open circuit potential which is used to determine corrosion of materials?

The open circuit (oc) potential is the potential of the working electrode relative to the reference electrode when no potential or current is being applied to the cell.


Difference between reference electrode and indicator electrode?

Often electrochemical studies are interested in one of the electrodes of the cell only. The second electrode is present to complete the cell. Electrode of interest is named working electrode or the indicator electrode; the second electrode is know as reference electrode or auxiliary electrode (counter electrode).