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Die Raschneutralisation von Wolframaten und Wolframatophosphaten in der Strömungsapparatur
Author(s) -
Schwarzenbach G.,
Geier G.,
Littler J.
Publication year - 1962
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19620450729
Subject(s) - chemistry , protonation , condensation , product (mathematics) , medicinal chemistry , stereochemistry , organic chemistry , thermodynamics , ion , physics , geometry , mathematics
With a rapid flow apparatus the investigation of the simple protonation of WO 4 2− was achieved (p K 1 + p K 2 = 8,1, both H + being added almost simultaneously). The rapid condensation which follows the protonation leeds during the first decisecond to a product of Z = 1.25, probably H 5 W 4 O 16 3− . A few minutes later, a new preequilibrium is established with (according to Sasaki) HW 6 O 21 5− ( Z = 1.167) as practically the only polynuclear product present. The final equilibrium is reached only very slowly.