Answer to Question #299423 in Physical Chemistry for Pavi

Question

What is half-wave potential? How is it related to standard reduction potential

Answer 1

Half wave potential $(E_\frac{1}{2})$ is a potential at which polarographic wave current of current-voltage curve is equal to one half of diffusion current $(i_d)$

The half wave potential is unique for each element and its different valence states and chemical forms.

Standard reduction potential provide a systematic measurement for different molecules tendency to be reduced.

It is defined relative to a standard hydrogen Electrode (SHE).

Half wave potential measurement in electro chemical cells can be used to determine specific analyte concentration, reaction rates, and valence states by comparing the measurements with some well known reference.