Ilkovic Equation:
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Definition: The Ilkovic equation describes the diffusion current at a dropping mercury electrode in polarography.
Purpose: It helps electrochemists determine the current resulting from the diffusion of electroactive species to the electrode surface.
The calculator uses the Ilkovic equation:
Where:
Explanation: The equation accounts for all factors affecting the diffusion process in polarographic measurements.
Details: Accurate diffusion current measurement is crucial for quantitative analysis in polarography and understanding electrode processes.
Tips: Enter the number of electrons, diffusion coefficient, mass flow rate, drop time, and concentration. Default values are provided for common experimental conditions.
Q1: What is the significance of the 607 constant?
A: This constant incorporates various conversion factors and fundamental constants specific to mercury electrodes.
Q2: How do I determine the diffusion coefficient?
A: It can be measured experimentally or found in chemical reference tables for specific ions.
Q3: What affects the mass flow rate of mercury?
A: The capillary dimensions and the height of the mercury reservoir control the flow rate.
Q4: Why is drop time important?
A: The current is measured just before the drop falls, so the drop lifetime affects the diffusion layer thickness.
Q5: Can this be used for non-mercury electrodes?
A: No, the equation is specifically derived for dropping mercury electrodes.