Name: Electrolysis of Aqueous Salts Using Inert Electrodes
Uploaded: 2019-07-19
Duration: 4 min 23 s
Description: The inert electrode does not participate in the chemical reaction and acts only as a source or sink for electrons. Isn't it interesting? Let's watch and lear...

Question

What is Electrochemical series? Mention its important applications.

Accepted Answer

Electrochemical series also sometimes referred to as activity series is a list that describes the arrangement of elements in order of their increasing electrode potential values. The series has been established by measuring the potential of various electrodes versus standard hydrogen electrode.

Application of Electrochemical Series:

1. Predicting the Feasibility of Redox Reaction

Any redox reaction would occur spontaneously if the free energy change $(ΔG)$ is negative. The free energy is related to cell emf in the following manner:

$ΔG ° = - nFE °$

2. Predicting the Product of Electrolysis

In case, two or more types of positive and negative ions are present in solution, during electrolysis certain metal ions are discharged or liberated at the electrodes in preference to others. In general, in such competition, the ion which is a stronger oxidizing agent (high value of standard reduction potential) is discharged first at the cathode.

What is Electrochemical series? Mention its important applications.

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