What Is Electrochemical Series?

Are you curious to know what is electrochemical series? You have come to the right place as I am going to tell you everything about electrochemical series in a very simple explanation. Without further discussion let’s begin to know what is electrochemical series?

In the realm of chemistry, the electrochemical series is a valuable tool that helps scientists and students comprehend the behavior of chemical elements and their compounds in electrochemical reactions. This series, also known as the “electromotive force (EMF) series” or “activity series,” provides insights into the relative reactivity of different substances. In this blog, we will delve into the electrochemical series, explore its significance, and understand how it influences various chemical processes.

What Is Electrochemical Series?

The electrochemical series is a list of elements and their ions arranged in order of their standard electrode potentials. In simpler terms, it ranks elements based on their tendency to gain or lose electrons and participate in chemical reactions, particularly redox (reduction-oxidation) reactions. The series helps predict whether a given reaction will occur spontaneously or not.

Key Components Of The Electrochemical Series:

  1. Standard Hydrogen Electrode (SHE): The electrochemical series is constructed with reference to the standard hydrogen electrode, which is assigned an electrode potential of 0 volts. All other elements’ potentials are measured relative to the SHE.
  2. Reduction Potential: Each element or ion in the series is associated with a reduction potential (measured in volts) that indicates its tendency to gain electrons and undergo reduction. More positive potentials suggest a stronger tendency to be reduced.
  3. Relative Reactivity: Elements and ions higher in the electrochemical series are more reactive and tend to undergo reduction more readily, while those lower in the series are less reactive.

Significance Of The Electrochemical Series

  1. Predicting Redox Reactions: The electrochemical series is a crucial tool for predicting whether a redox reaction will occur spontaneously. A redox reaction typically involves the transfer of electrons between substances. If an element or ion with a higher reduction potential is paired with one with a lower potential, a spontaneous redox reaction is likely to occur.
  2. Electrode Selection: It helps in selecting suitable electrodes for electrochemical cells, such as batteries and electrolysis cells. Electrodes with elements higher in the series are often used as anodes (negative electrodes), while those lower in the series serve as cathodes (positive electrodes).
  3. Corrosion Control: Understanding the electrochemical series is vital in controlling and mitigating corrosion in various industries, including construction, aviation, and marine engineering. Corrosion occurs when a metal undergoes oxidation, which can be managed by using metals with lower reduction potentials as sacrificial anodes.
  4. Galvanic Cells: The electrochemical series provides insights into the functioning of galvanic cells, which are devices that convert chemical energy into electrical energy. The potential difference between the anode and cathode determines the cell’s voltage and electrical output.

Examples From The Electrochemical Series

  1. Highly Reactive: Elements like potassium (K), sodium (Na), and calcium (Ca) are near the top of the electrochemical series and are highly reactive. They readily lose electrons and form cations in reactions.
  2. Hydrogen Ion (H+): The hydrogen ion (H+) is assigned a standard electrode potential of 0 volts and serves as a reference point in the series. Elements above hydrogen in the series can displace hydrogen ions in reactions, while those below it cannot.
  3. Noble Gases: Noble gases such as helium (He), neon (Ne), and argon (Ar) are at the bottom of the electrochemical series. They are inert and have very low reactivity, making them unlikely to participate in redox reactions.


The electrochemical series is a valuable tool in chemistry that provides insights into the relative reactivity of elements and ions in electrochemical reactions. It plays a pivotal role in predicting the spontaneity of redox reactions, selecting appropriate electrodes for various applications, and understanding the behavior of elements in galvanic cells and corrosion control. By studying the electrochemical series, scientists and researchers can unravel the fascinating world of chemical reactions and harness their potential for practical applications in diverse fields.


What Is The Electrochemical Series Of Class 12?

Activity series or electrochemical series is a list that comprises arrangements of elements in the order of increasing electrode potential values. By comparing and measuring the Standard Hydrogen Electrode (SHE) with respect to the potential electrodes, the series has been devised.

What Is The Electrochemical Series In Class 11th Chapter?

The electrochemical series is defined as the arrangement of the elements in their increasing order of electrode potential values. The electrochemical series is sometimes referred to as activity series.

What Is Electrochemical Series Of Metal?

The electrochemical series (also known as the activity series) is a list of metals listed in order of decreasing reactivity or in the order of decreasing ease of oxidation. The activity of the metal depends on its tendency to lose electron or electrons, i.e., tendency to form cation .

How To Learn Electrochemical Series Class 11?

Easy tricks to remember the electrochemical series

  • Kings- POTASSIUM.
  • Can- CALCIUM.
  • Not- (NA)SODIUM.
  • Make- MAGNESIUM.
  • Zebra- ZINC.
  • I – IRON.
  • Like- LEAD.

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