Kinetics of reactions of technetium. VIII. Reduction of Tc(VII) by ascorbic acid in HC1 solution

Journal Article · Tue Mar 01 00:00:00 EST 1988 · Sov. Radiochem. (Engl. Transl.); (United States)

OSTI ID:6281127

Koltunov, V S; Gomonova, T V; Shapovalov, M P; Abramova, I G

The reduction of Tc(VII) by ascorbic acid in HCl solution proceeds according to the equation 2TcO/sub 4//sup -/ + 3C/sub 6/H/sub 8/O/sub 6/ + 10HCl = 2TcCl/sub 5//sup -/ + 3C/sub 6/H/sub 6/O/sub 6/ + 8H/sub 2/O. The reaction is characterized by an induction period, after the conclusion of which its rate is equal to -d(Tc(VII))/dt = k(Tc(VII)) x (C/sub 6/H/sub 8/O/sub 6/) (H/sup +/)/sup 1.6/, where k = 0.898 + 0.064 liter/sup 2.6//mole/sup 2.6./min at 25/sup 0/C and ..mu.. = 2. The reaction mechanism includes a slow step of interaction of TcO/sub 3//sup +/ ions with C/sub 6/H/sub 8/O/sub 6/ molecules and ascorbate complexes of Tc(IV). The full kinetic equation describing the course of the reaction, including the induction period, is obtained.

• OSTI ID: 6281127
• Journal Information: Sov. Radiochem. (Engl. Transl.); (United States), Vol. 29:4; Other Information: Translated from Radiokhimiya; 29: No. 4, 489-494(Jul-Aug 1987)
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ASCORBIC ACID
REDOX POTENTIAL
TECHNETIUM COMPOUNDS
REDUCTION
CATALYSIS
CHEMICAL REACTION KINETICS
HYDROCHLORIC ACID
KINETIC EQUATIONS
REACTION INTERMEDIATES
REDUCING AGENTS
SPECTROPHOTOMETRY
STOICHIOMETRY
TECHNETIUM CHLORIDES
TECHNETIUM OXIDES
VALENCE
CHALCOGENIDES
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
EQUATIONS
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
KINETICS
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
REFRACTORY METAL COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
VITAMINS
400201* - Chemical & Physicochemical Properties