Question

How does the electrochemical series help in comparing the relative reducing or oxidising powers of different elements?

Answer 1

1. The electrochemical series is the arrangement of various electrodes in the decreasing order of their standard reduction potentials.
2. An element with a lower standard reduction potential tends to lose electrons more readily and thus acts as a better reducing agent, whereas an element with a higher reduction potential accepts electrons more easily and acts as a better oxidising agent.
3. Thus, elements placed at the top of the electrochemical series (like Li, K, and Ca) are stronger reducing agents, while those at the bottom (like F₂, Cl₂, Br₂) are stronger oxidising agents.
4. This comparative order enables prediction of whether a redox reaction will occur spontaneously based on the relative positions of the elements in the series.