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The Formation of CrO 2+ 2 in the Reaction of Cr 2+ + O 2 in Aqueous Acid Solutions
Author(s) -
Ilan Y. A.,
Czapski G.,
Ardon M.
Publication year - 1975
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1002/ijch.197500004
Subject(s) - chemistry , aqueous solution , chemical reaction kinetics , chemical reaction , chemical kinetics , radiochemistry , kinetics , organic chemistry , physics , quantum mechanics
The reduction rate of Cr 3+ by e aq was determined, k 8 = 1.7 × 10 10 M −1 s −1 . The reaction of Cr 2+ with O 2 was studied, k 2 = 1.6 × 10 8 M −1 s −1 . The spectrum of CrO 2+ 2 was obtained both with the pulse radiolysis method and by mixing Cr 2+ with excess of O 2 . It was shown that CrO 2+ 2 decays slowly to yield HCrO − 4 . The results suggest that the reaction of Cr 2+ with O 2 is a two electron transfer process.