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Rotating Platinum Electrode (RPE)
A Rotating Platinum Electrode (RPE) serves as a specialized electrochemical instrument used in various electrochemical studies and experiments. It comprises a platinum electrode that researchers rotate at a controlled speed while immersing it in an electrolyte solution. This article will describe its construction, operation, and applications. Construction 1. Platinum Electrode: …
Dropping Mercury Electrode (DME)
Analytical chemists use a Dropping Mercury Electrode (DME) as an electrochemical instrument, especially for investigating various electrochemical reactions. It consists of a small droplet of mercury continuously replenished by a controlled flow of mercury from a reservoir. Here’s how it is constructed and works: Construction 1. Mercury Reservoir: The DME …
Ilkovic equation
The Ilkovic equation, named after the Russian scientist Mikhail Ilkovic, serves as a fundamental equation in electrochemistry to describe the behavior of double-layer capacitors, often referred to as supercapacitors or ultracapacitors. It provides a simplified model for understanding the relationship between the charge (Q) stored in the double layer and …
Polarography
Polarography is an electroanalytical technique that determines the concentration of specific analytes in a solution by measuring the current flowing in an electrochemical cell as a function of the applied voltage. The principle of polarography is based on the behavior of electrodes at varying voltages, which allows for the quantitative …
Potentiometric titrations
In potentiometric titrations, accurately measuring the analyte concentration in a sample relies on determining the endpoint. We employ various methods to detect the endpoint, depending on the type of titration and the specific ion or parameter being measured. Here are some common methods for endpoint determination in potentiometric titrations and …
Indicator Electrodes
Indicator electrodes detect and respond to changes in the analyte of interest within a sample solution in electrochemical measurements. These electrodes play a pivotal role in various electrochemical techniques, such as potentiometry and voltammetry. Indicator electrodes interact with the analyte to generate electrical signals for measuring and quantifying target species. …
Reference Electrodes
Reference electrodes are stable and well-defined electrodes used as a reference point in electrochemical measurements. They provide a known and constant electric potential against which other electrodes, particularly working electrodes, can be compared. Reference electrodes are essential in electrochemical techniques, ensuring accurate potential measurement and understanding the electrochemical behavior. Examples …
Electrochemical cell
An electrochemical cell in potentiometry consists of two main components: an indicator electrode (working electrode) and a reference electrode. These components work together to measure the electrical potential (voltage) difference between them in the presence of an analyte in the sample solution. Here’s a brief overview of the components and …
Potentiometry
Analytical chemists and electrochemists widely use the potentiometry technique to measure the electrical potential (voltage) of an electrochemical cell, which often involves an indicator electrode, a reference electrode, and a sample solution. They apply this technique for various purposes in analytical chemistry and electrochemistry. Principle Potentiometry is based on the …
