Question

Half wave potential is related to _______

• A. \( \text{Potentiometry} \)
• B. \( \text{Voltammetry} \)
• C. \( \text{Polarography} \)
• D. \( \text{Conductometry} \)

Hint:

Think of "half-wave" and "dropping mercury" together – they are key features of polarography.

Answer 1

The Correct Option is C

The half-wave potential (\( E_{1/2} \)) is a characteristic potential in polarography, a type of voltammetry where a dropping mercury electrode (DME) is used as the working electrode. It is the potential at which the current is half of the limiting current and is related to the standard electrode potential of the electroactive species and can provide qualitative information about the analyte. While voltammetry is the broader technique, the term "half-wave potential" is specifically associated with polarography using a DME. Potentiometry measures the potential of an electrochemical cell under zero current conditions. Conductometry measures the electrical conductivity of a solution.