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Autocatalysis and bistability in the reaction between nitric acid and thiocyanate
Author(s) -
Bazsa Gyöurgy,
Epstein Irving R.
Publication year - 1985
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.550170606
Subject(s) - autocatalysis , chemistry , nitric acid , thiocyanate , bistability , stopped flow , induction period , nitric oxide , kinetics , inorganic chemistry , photochemistry , organic chemistry , catalysis , reaction rate constant , physics , quantum mechanics
The reaction between nitric acid and thiocyanate has been studied both in batch and flow configurations. The batch reaction is autocatalytic with an induction period which is decreased by the addition of HNO 2 . At the nitric acid concentrations employed (1–10 M), a red NOSCNH + intermediate is formed. The reaction in a flow reactor exhibits bistability. A model involving competitive reactions of SCN − and NOSCNH + with NO 2 is suggested, and computer simulations with this model give good agreement with both the batch and flow experiments.