The conductance is defined as the current flow through the conductor. In other words, it is defined as the reciprocal of the resistance. This method is mainly used for the determination of the physico-chemical properties of the compounds. The movement of the ions is mainly depended on the concentration of the ions.
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Vreeland oscillator by Taylor and Acree. When electical potential is applied across electrodes two process occurs. Ions accumulate near the electrodes. Transfer of charge through the interface. Note : DC current is not employed in conductance measurement because Electrodes becomes polarised leading to high cell resistance.
PowerPoint Presentation: Conductivity cells:- Made of pyrex or quartz and are fitted with two platinum electrodes. Should be placed in vessel containing water to maintain constant temperature Types : Wide mouthed cell Cell for reactions producing precipitation Dip type cells PowerPoint Presentation: Wide mouthed cell:- Measurement of low conductance Wide mouthed fitted with an ebonite cover which has provisions for platinum electrodes and burettes PowerPoint Presentation: Cell for reactions producing ppts: Mainly used for ppt reactions Also wide mouthed fitted with ebonite cover which has provisions for burette ,electrode , stirrer Stirrer may be mechanical or magnetic PowerPoint Presentation: Electrodes : Platinum sheets, each of 1 cm 2 are fixed at distance of 1 cm The surface is coated with platinum black to avoid polarization effects and increase effective surface area.
The sliding contact with galvanometer G can be moved on the wire of meter bridge by means of jockey M so that resistance of unknown is balanced with that of standard. Skoog , F. James Holler and Stanly R. Text book of pharmaceutical analysis , third edition by Dr.
Ravi sankar. Presented by Suresh.
In that various characteristic like quality control, pollution control, process monitoring and managing require performing conductivity measurement regularly. Conductivity is the measure of the ability of the material to carry out electrical current. Conductivity measurement of the sample solution provides the degree of electrical conductivity in the definite quantity of the solution. The electrical conductivity of the solution is similar to the number of ions available in it and therefore the conductivity measurement of a solution will give a reading of the solution. The principle by which the system measures the conductivity is simple. There are two conductivity plates are situated in the sample and potentially apply to them usually ac voltage and after that, the current is measured. By voltage and current values, conductivity can be determined.
Learn how and when to remove this template message Look up conductometry in Wiktionary, the free dictionary. Conductometry is a measurement of electrolytic conductivity to monitor a progress of chemical reaction. Conductometry has notable application in analytical chemistry , where conductometric titration is a standard technique. In usual analytical chemistry practice, the term conductometry is used as a synonym of conductometric titration, while the term conductimetry is used to describe non-titrative applications. It was also around this time when Willis Whitney, who was studying the interactions of sulfuric acid and chromium sulfate complexes, found the first conductometric endpoint.