By Y. Marcus
Read Online or Download Critical Evaluation of Some Equilibrium Constants Involving Organophosphorus Extractants PDF
Similar general & reference books
The molecular constitution hypothesis--that a molecule is a suite of atoms associated by way of a community of bonds-- presents the critical technique of ordering and classifying observations in chemistry. in spite of the fact that this speculation isn't comparable on to the physics which governs the motions of atomic nuclei and electrons.
Prof. Dr. -Ing. Reinhard Seeling - Rheinisch-Westfälische Technische Hochschule Aachen
Additional resources for Critical Evaluation of Some Equilibrium Constants Involving Organophosphorus Extractants
M = C M /C M , provided MA«S It is doubtful whether the corrections from C. g. e. in aqueous uranyl nitrate, 2+ [A ] = 2[M ] so that 2+ - 2 [Mz ][A ] is replaceable by The quantity [S] is somewhat more difficult to estimate accuratley. 4[M 2+3 ] . The total analytical concentration of S at equilibrium, C„, differs somewhat from the in itial value C ° because of water coextration (or HA and water coextraction, when the former is present), causing volume changes, approximately proportional to C q .
Acta, 24A, 529 (1968). J. , J. Phys. , 73_, 675 (1969). VII. Solvent: Tri-n-butylphosphate (TBP) , S Ligand: Nitrate (NO ~) , A~ Reaction: H + + A~ + S" = HAS (VII-1) This reaction is the major one in this system with both undiluted S as well as with its solutions in inert diluents, provided the HA concentration in the equilibrium aqueous phase is below 7 M. (56A, 56F, 57A, 58P, 58S, 60A, 62D, 63N, 64Z, 65K, 65S, 69S) Above this concentration, more HA enters the organic phase than cor- - 34 responds to HAS.
1 (X-scale) in any case, so the value of n is immaterial. 01 x H ^ Q ^ . (VIII-7) where x is the molar ratio of water to S in undiluted, hydrated S and p is the density of this phase, will be taken as the 7 ς = 1 arbitrarily. equilibrium constant, setting The data of several authors (59B, 591, 60H) can be utilized, since they pertain to sufficiently low C„. , and yield small values Q ^ v cannot be extrapolated back. ^ so that their disagreement is im material. (59B). The data have been corrected to the molar scale where necessary The values obtained are shown in Table VIII-1.
Critical Evaluation of Some Equilibrium Constants Involving Organophosphorus Extractants by Y. Marcus