Which are true for polarography?
I Polarography is amperometry conducted with a dropping Hg electrode.
II The diffusion current in the plateau region of the polarographic wave is proportional to the concentration of the analyte and is used for quantitative analysis.
III The half-wave potential for maximum current is characteristic of a given analyte in a given medium and can be used for qualitative analysis for the analyte.
IV Fresh Hg drops give reproducible results.
V Polarography is used to primarily to study oxidations Hg may reduce when studying reductions.

Question

Quizplus · Accepted Answer

Polarography, a type of amperometry using a dropping mercury electrode (I), is characterized by a diffusion current in the plateau region that is proportional to the analyte concentration, allowing for quantitative analysis (II). The half-wave potential is unique for each analyte in a specific medium, facilitating qualitative analysis (III). Fresh mercury drops ensure consistent and reproducible results (IV). Statement V is incorrect because polarography is primarily used for studying reductions, not oxidations, that mercury may reduce.

Which Are True for Polarography