The Coulometric Titration of Acids and Bases in Dimethylsulfoxide Media

THE COULOMETRIC TITRATION OF ACIDS AND BASES IN nz-CRESOL MEDIUM

Coulometric titration of acids in non-aqueous solvents.

Coulometric titrations of mineral acids, sulphonic acids, carboxylic acids, enols, imides and phenols have been carried out in t-butanol or in acetone with electrically generated tetrabutylammonium hydroxide. Either a potentiometric titration or a visual indicator end-point may be used. The amount of acid titrated ranges from 10 to 60 muequiv, and the precision and accuracy of the method are ex...

Precise Coulometric Titrations of Potassium Dichromate

This paper reports results of a continuing investigation to evaluate coulometric methods of analysis and to develop highly precise and accurate analytical methods for important materials, based upon this technique. Earlier papers described the coulometric titrations of acids and bases [1] 1 and of halides [2]. The present research is concerned with a typical oxidation-reduction titration, the a...

Precise Coulometric Titration of Acids and Bases

Apparatus and techniques a re dc~cribed for t he t itration of ac ids a nd. bases by constantcurrent coulometry. The precision nnd accuraey of t he method aI~e JndLcated by tl traLlons of benzoic acid, potass ium acid pMhalate, adLpiC aCld, hydroc~lo l'l c aCid, ~nd sod ium eal'bonate. Standard deviations of ± 0.003 p er cent have been obtaIned which LndlCatp. that the reliabi li ty of the meth...

AN NMR STUDY OF IONIC SOLVATION OF ALKALINE EARTH CATIONS WITH DIMETHYLSULFOXIDE IN NITROMETHANE SOLUTION

A proton NMR method for the determination of the solvation numbers of alkaline earth cations with dimethylsulfoxide (DMSO) in nitromethane as diluent is described. The method is based on the monitoring of the resonance frequency of DMSO protons as a function of DMSO to metal ion mole ratio while keeping the metal ion concentration constant. The average solvation number of cations at any...