Question

How does the electrochemical series help in predicting whether a given reaction is feasible in a given direction or not?

How does an electrochemical series help us in predicting whether a redox reaction is feasible in a given direction or not?

Answer 1

1. The electrochemical series helps in predicting the feasibility of a redox reaction by comparing the standard electrode potentials (E°) of the two half-cells involved. 
2. A redox reaction is feasible if the species with a higher E° value undergoes reduction and the one with a lower E° value undergoes oxidation.
3. This ensures that the cell potential \[\ce{(E^°_{cell})}\] is positive, indicating a spontaneous reaction.
4. Hence, by using the electrochemical series, we can determine the direction of electron flow and decide whether a given redox reaction will occur or not.