Construction of Standard Electrode Potential
For standard electrode potential, the Standard Hydrogen Electrode is considered as a respected reference electrode and will be taken to show the zero volts at any temperature.
- It consists of an anode made of platinum and immersed in the solution that has already passed hydrogen gas in it.
- This solution also uses a wire that acts as a standard electrode or the reference point and requires a 0 volt potential as the reference point for all temperatures.
- To put it simply, it is a two-part energetic system made from the platinum electrode and H+.
- The SHE serves as the reference point for measuring electrode potentials in electrochemical cells.
Conditions for Standard Electrode Potentials
The standard electrode potential occurs in an electrochemical cell say the temperature = 298K, pressure = 1atm, concentration = 1M. The symbol ‘Eocell’ represents the standard electrode potential of a cell.
The standard electrode potential, often denoted as E°, is the measure of the tendency of a chemical species to gain or lose electrons when it is in its standard state. Here are the conditions typically associated with standard electrode potential:
Standard State: The species involved in the electrode reaction must be in their standard state, which usually means that they are at 1 atmosphere pressure, at a specified temperature (often 25°C or 298 K), and in a concentration of 1 mol/L (for solutions).
Concentration: The concentration of ions in solution should be 1 mol/L. This is a convention to standardize the comparison of electrode potentials. For gases, the pressure should be 1 atmosphere.
Electrodes: Electrodes involved in the reaction must be inert (do not participate in the reaction) and have a known potential. For example, the standard hydrogen electrode (SHE) is often used as a reference.
Temperature: The temperature should be specified, often 25°C (298 K), unless stated otherwise. This is important because electrode potentials can vary with temperature.
Standard Electrode Potential
Standard electrode potential (E°) is a measure of the tendency of a half-reaction to occur as a reduction at a standard condition. In the context of standard electrode potential, “standard conditions” refer to a set of specific conditions under which the potential is measured. It includes standard concentration of all aqueous species to be 1 mol/L, pressure to be 1 atm and temperature to be 25℃ or 298K.
In this article, we will learn in detail about standard electrode potential, its formula, construction, factors affecting and applications.
Table of Content
- What is Standard Electrode Potential?
- Standard Electrode Potential Formula
- Construction of Standard Electrode Potential
- Difference Between Electrode Potential and Standard Electrode Potential
- Factors Affecting Electrode Potentials
- Standard Electrode Potential Example
Contact Us