Question

Define the electrochemical series and write its two applications.

Hint:

The electrochemical series helps predict the spontaneity of redox reactions and determines electrode potential differences in cells.

Answer 1

Definition of Electrochemical Series:
The electrochemical series is a list of standard electrode potentials \( (E^\circ) \) of elements arranged in order of increasing or decreasing ability to lose or gain electrons. 
Applications of the Electrochemical Series:

1. Predicting Redox Reactions
   • A species with a lower reduction potential acts as a reducing agent.
   • A species with a higher reduction potential acts as an oxidizing agent.
2. Determining Electrochemical Cell Feasibility
   • A spontaneous reaction occurs when \( E^\circ_{\text{cell}} = E^\circ_{\text{cathode}} - E^\circ_{\text{anode}} \) is positive.