Difference Between Electrode Potential and Standard Electrode Potential
The difference between electrode potential and standard electrode potential is given below:
Criteria |
Electrode potential |
Standard Electrode Potential |
---|---|---|
Definition |
The voltage or potential difference between an electrode and its electrolyte under specific conditions, which may or may not be standard. |
The electrode potential measured under standard conditions, including a specified temperature, pressure, and concentration. |
Conditions |
Can be measured under any conditions, including non-standard temperature, pressure, and concentration. |
Measured under standard conditions: 1 atm pressure (for gases), 1 M concentration (for solutions), and a specified temperature (often 25°C or 298 K). |
Representation |
Represented as E |
Represented as E0 |
Dependence on Conditions |
Depends on the concentration of ions in solution, temperature, pressure, and other factors. |
Independent of concentration and other non-standard conditions. |
Comparison |
Used to understand the electrochemical behavior of a system under specific conditions. |
Provides a standardized measure of the tendency of a species to gain or lose electrons under specific conditions. |
Nernst Equation |
Can be used in the Nernst equation to calculate electrode potential under non-standard conditions. |
Used in the Nernst equation to calculate the actual electrode potential under non-standard conditions. |
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