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The Role of Cations in Some Inorganic Hydrolysis Reactions
Author(s) -
PerlmutterHayman B.,
Wieder H.,
Wolff Michael A.
Publication year - 1973
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.197300005
Subject(s) - chemistry , solvolysis , hydrolysis , chlorine , halide , iodide , inorganic chemistry , catalysis , ion , organic chemistry
Abstract Cations which shift certain equilibria from left to right by forming a compound with one of the reaction products were investigated with respect to their kinetic role in the process. Silver ions have no influence on the rate of the hydrolysis of cyanogen iodide. Similarly, cations which form sparingly soluble carbonates do not influence the rate of hydration of carbon dioxide. On the other hand, the hydrolysis of chlorine is accelerated by Ag + and, to a lesser extent, by Cd 2+ and Fe(III). It is shown that the effect is not due simply to a bimolecular reaction between chlorine and the cation. In the case of Ag + , heterogeneous catalysis may play some role, in analogy with the solvolysis of organic halides. In the case of Cd 2+ , there is spectrophotometric evidence for compounds between Cl 2 and HOCl on the one hand, and the cation on the other. It is suggested that these compounds interconvert more rapidly than do the parent substances. A similar mechanism may be operative in the case of Fe(III), and, possibly, also in the case of Ag + .