Potentiometric acid-base titrations in molten salts
1964; Elsevier BV; Volume: 8; Issue: 2 Linguagem: Inglês
10.1016/0022-0728(64)87006-6
ISSN2590-2946
AutoresA.M. Shams El Din, A.A. El Hosary,
Tópico(s)Electrochemical Analysis and Applications
ResumoSilver, nickel, copper, iron and tungsten were successfully applied as indicator electrodes in the titration of the acid K2Cr2O7 in molten KNO3 at 350°. With all electrodes sharp potential drops were recorded at the theoretically calculated equivalence points. Because of differences in E° potentials (as oxygen electrodes), the measurement of potential differences between any two indicator electrodes allowed the determination, of equivalence points. In this type of titration no reference electrode is needed. Bimetallic combinations were equally suitable for the determination of equivalence points of acids neutralizing in more than one step, e.g., NaPO3 and NaH2PO4.
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