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Initiation process in the system Fe 3+ + H 2 O 2
Author(s) -
Kozlov Yu. N.,
Nadezhdin A. D.,
Pourmal A. P.
Publication year - 1974
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.550060308
Subject(s) - chemistry , decomposition , ferric ion , reaction rate constant , analytical chemistry (journal) , molecule , allowance (engineering) , ferric , ion , range (aeronautics) , inorganic chemistry , kinetics , chromatography , organic chemistry , mechanical engineering , physics , materials science , quantum mechanics , engineering , composite material
An inhibitor method for measuring the initiation rate is proposed for the system Fe 3+ + H 2 O 2 . C(NO 2 ) 4 was used as inhibitor. The number of chains terminated by one C(NO 2 ) 4 molecule was estimated in specific photochemical experiments and found to be unity. The initiation appeared to involve two processes. The first is proportional to the first power of ferric ion concentration, and the second to the second power. The rate constants and activation energies of these processes are determined. Allowance for the second initiation process permitted qualitative and quantitative description of various reported data on H 2 O 2 decomposition rates over a wide range of Fe 3+ , H 2 O 2 , and H + concentrations.