On the definition of distribution equilibrium potentials in the distribution systems with simple salts

Kudo, Yoshihisa

doi:10.15406/japlr.2019.08.00333

Cited by 1 publication

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References 5 publications

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“…Equation (3) is the modified form of the Nernst equation [16]; this expression has a little problem in its definition (see ref. [17]). As similar to Equation (3), the following equation can hold (see Appendix A for its derivation).…”

Section: Derivation Of Analytic Equation Under the Conditions Of Diffmentioning

confidence: 99%

Distribution of Ag(I), Li(I)-Cs(I) Picrates, and Na(I) Tetraphenylborate with Differences in Phase Volume between Water and Diluents

Ikeda¹,

Morioka²,

Kudo³

2020

AJAC

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Ionic strength conditions in distribution experiments with single ions are very important for evaluating their distribution properties. Distribution experiments of picrates (MPic) with M = Ag(I) and Li(I)-Cs(I) into o-dichlorobenzene (oDCBz) were performed at 298 K by changing volume ratios (V org /V) between water and oDCBz phases, where "org" shows an organic phase. Simultaneously, an analytic equation with the V org /V variation was derived in order to analyze such distribution systems. Additionally, the AgPic distribution into nitrobenzene (NB), dichloromethane, and 1,2-dichloroethene (DCE) and the NaB(C 6 H 5 ) 4 (=NaBPh 4 ) one into NB and DCE were studied at 298 K under the conditions of various V org /V values. So, extraction constants (K ex ) for MPic into the org phases, their ion-pair formation constants (K MA,org ) for MA = MPic in the org ones, and standard distribution constants ( S D,M K ) for the M(I) transfers between the water and org bulk phases with M = Ag and Li-Cs were determined at the distribution equilibrium potential (dep) of zero V between the bulk phases and also the K ex (NaA), K NaA,org , and S D,A K values were done at 4 A BPh − − = . Here, the symbols K ex , K MA,org , and S D,M K or S D,A K were defined as [MA] org /[M + ][A − ], [MA] org /[M + ] org [A − ] org , and [M + ] org /[M + ] or [A − ] org /[A − ] at dep = 0, respectively. Especially, the ionic strength dependences of K ex and K MPic,org were examined at M = Li(I)-K(I) and org = oDCBz. From above, the conditional distribution constants, K D,BPh4 and K D,Cs , were classified by checking the experimental conditions of the I, I org , and dep values. BPh − into some diluents. The S D,Ag K values were obtained from NB, DCE, oDCBz, and dichloromethane (DCM) systems with the reported S D,Pic K value [5] [8] [11] of picrate ion (Pic − ), the S D, j K values at j = Li + -Cs + from oDCBz one with that [5] of Pic − , and the S D,BPh4 K values from NB and DCE ones with the S D,Na K value [8] of Na + . In the experiments corresponding to the above systems, volume ratios (=V org /V = r org/w ) of the both phases were changed and accordingly an equation for analyzing such systems was derived; V org and V refer to an experimental volume (L unit) of the org phase and that of the w one, respectively. Also, the K ex , K MA,org , and K D,MA values were obtained at 298 K from the same combinations of M + A − and the diluents. Here, the symbols K ex , K MA,org , and K D,MA were defined as [MA] org /[M + ][A − ], [MA] org /[M + ] org [A − ] org , and [MA] org /[MA], respectively. Moreover, extraction, ion-pair formation, and distribution properties for the above systems were S. Ikeda et al.

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Section: Derivation Of Analytic Equation Under the Conditions Of Diffmentioning

confidence: 99%

Distribution of Ag(I), Li(I)-Cs(I) Picrates, and Na(I) Tetraphenylborate with Differences in Phase Volume between Water and Diluents

Ikeda¹,

Morioka²,

Kudo³

2020

AJAC

View full text Add to dashboard Cite

show abstract

On the definition of distribution equilibrium potentials in the distribution systems with simple salts

Abstract: A deviation in the definition of distribution equilibrium potential between electrochemical and extraction-chemical phenomena was discussed and examined quantitatively.

Cited by 1 publication

References 5 publications

Distribution of Ag(I), Li(I)-Cs(I) Picrates, and Na(I) Tetraphenylborate with Differences in Phase Volume between Water and Diluents

Distribution of Ag(I), Li(I)-Cs(I) Picrates, and Na(I) Tetraphenylborate with Differences in Phase Volume between Water and Diluents

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