"Text" is a predefined property that represents text of arbitrary length and is provided by Semantic MediaWiki. This property is pre-deployed (also known as special property) and comes with additional administrative privileges but can be used just like any other user-defined property.
C
Coulombic efficiency +
coulombicefficiency +
CoulombicEfficiency +
coulombicefficiency +
fraction of the electric current passing through an electrochemical cell which accomplishes the desired chemical reaction +
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Coulometer +
coulometer +
measuring instrument to obtain the electrical charge passed in an experiment, or to produce a known amount of substance in a titration. +
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CoulometricTitration +
Titration in which the titrant is generated electrochemically, either by constant current or at constant potential. The titrant reacts stoichiometrically with the analyte, the amount of which is calculated using Faraday’s laws of electrolysis from the electric charge required to reach the end-point. Coulometric titrations are usually carried out in convective mass transfer mode using a large surface working electrode. The reference and auxiliary electrodes are located in sepa- rate compartments. A basic requirement is a 100 % current efficiency of titrant generation at the working electrode. End-point detection can be accomplished with potentiometry, amperometry, biamperometry, bipotentiometry, photometry, or by using a visual indicator. The main advantages are that titration is possible with less stable titrants, the standardi- zation of titrant is not necessary, the volume of the test solution is not changed, and the method is easily automated. +
coulometrictitration +
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Coulometry +
Coulometry +
Electrochemical measurement principle in which the electric charge required to carry out a known electrochemical reaction is measured. By Faraday’s laws of electrolysis, the amount of substance is proportional to the charge. Coulometry used to measure the amount of substance is a primary reference measurement procedure [VIM 2.8] not requiring calibration with a standard for a quantity of the same kind (i.e. amount of substance). The coulometric experiment can be carried out at controlled (constant) potential (see direct coulometry at controlled potential) or controlled (constant) current (see direct coulometry at controlled current). +
coulometry +
coulometry +
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