Electrometric titrations of Bi(III), Cu(II), Pt(IV), Te(VI) and Te(IV) with standard iron(II) solution in alkaline medla containing hexitols

✍ Scribed by B. Velikov; J. Doležal

• Publisher: Elsevier Science
• Year: 1977
• Tongue: English
• Weight: 528 KB
• Volume: 93
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(77)80020-2

✦ Synopsis

Potentiometric, bipotentiometric and biamperometric titrations with an iron(K) salt in akxline solutions containing sorbitol are reported_ Suitable conditions are discussed for determinations based on the Bi( III) -Bi", Cu(U) --L Cu(1) -Cu", Pt(IV) -F't(I1) -Pt" and Te( VI) -Te( IV) -Tee -teiluride systems. Potentiometric, bipotentiometric and biamperometric titrations of some inorganic systems with iron(I1) soIutions in alkaline hexitol media have been reported [l] . In these systems, the metal ions were reduced by iron to a lower valence state, e.g. Cr(V1) -+ Cr(IIX), U(V1) -c U(IV), etc. The present paper describes the utilization of the negative formal redox potential of the Fe(III)/Fe(II) system in alkaline hexitol (especially sorbitol) media for the titration of some systems involving reduction of various ions, e.g. Bi(III), Cu(II), Pt.(N), Te(VI) and 're(iV), to the metal.