Single ion activity coefficients of chloride ions in aqueous sodium chloride and magnesium chloride estimated potentiometrically based on ionic liquid salt bridge at 298 K

Kakiuchi, Takashi; Hisazumi, Masaki; Moriyama, Yasufumi; Yamamoto, Masahiro

doi:10.1016/j.elecom.2021.106953

Cited by 4 publications

(1 citation statement)

References 34 publications

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“…By replacing the salt bridge based on concentrated KCl with ILSB, it has been shown in the past nearly twenty years since ILSB was proposed 8,9 that potentiometry allows us to more reliably estimate single ion activities, including pH defined in terms of the single ion activity of hydrogen ion. [10][11][12][13][14][15][16][17][18][19][20][21][22] Potentiometric titration based on ILSB offers an alternative of the traditional understanding of potentiometric titration described above.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Potentiometric Titration Based on the Reference Electrode Equipped with Ionic Liquid Salt Bridge — 1. Precipitation Titration of Chloride with Silver Ions in Water

et al. 2023

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A reference electrode equipped with ionic liquid salt bridge consisting of tributyl(2-methoxyethyl)phosphonium bis(pentafluoroethanesulfonyl)amide has been employed for potentiometric precipitation titration of chloride with silver ions in water at 25 • C. A model for the titration curve was regressed to experimental curves, taking into account the change in the activity coefficients of relevant ionic species in the course of the titration, to obtain the least square estimates of two adjustable parameters in the model, the solubility product (K sp ) and the ana-lyte concentration. The least-square estimate of K sp , (1.840 ± 0.060)×10 − 10 , i.e., pK sp = 9.736± 0.014, is in good agreement with literature data, but with higher precision.

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