IGNOU MCH 4 2017 - Give comparison between coulmetric and volumetric titrations

Question

Give comparison between coulmetric and volumetric titrations

08 Mar 2018

Answer :

Word Count : 697

COULOMETRIC TITRATIONS

In a coulometric titration the titrant is generated electrochemically by constant current from a proper electrolyte. Coulometric titrations are in many ways similar to volumetric titrations: the concentration of the titrant is equivalent to the generating current, and the volume of the titrant is equivalent to the generating time. The two modes are exemplified with an argentometric titration.

Image ignouacademy-com--p-titrations-35112

Image ignouacademy-com--p-ignou-15922

Titration of chlorides with Ag+: (a) volumetric, (b) coulometric.

Coulometric titrations have numerous advantages

Volumetric titrations

Volumetric or titrimetric analyses are quantitative analytical techniques which employ a titration in comparing an unknown with a standard. In a titration, a volume of a standardized solution containing a known concentration of reactant "A" is added incrementally to a sample containing an unknown concentration of reactant "B". The titration proceeds until reactant "B"

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