Acid-Base Equilibria in Glacial Acetic Acid. I. Spectrophotometric Determination of Acid and Base Strengths and of Some Dissociation Constants

I. M. Kolthoff; S. Bruckenstein

doi:10.1021/ja01582a001

Acid-Base Equilibria in Glacial Acetic Acid. I. Spectrophotometric Determination of Acid and Base Strengths and of Some Dissociation Constants

I. M. Kolthoff
, S. Bruckenstein

Chemistry

University of Minnesota Twin Cities

Research output: Contribution to journal › Article › peer-review

89 Scopus citations

Abstract

The following constants are defined for an acid: ionization or ion-pair formation, [formula omitted] dissociation, [formula omitted]; and over-all dissociation, [formula omitted]. Similar constants are defined for bases. The formation constant of the salt of an (indicator) base, I, and an acid is given by [formula omitted]. The strength of an acid depends upon the kind of (indicator) base used for reference and vice versa. From spectrophotometric measurements at 25° with p-naphtholbenzein (PBN) as indicator base, the following constants have been derived: [formula omitted] (HTs = p-tolnenesulfonic acid), [formula omitted]. The heat of reaction of I + HX ⇄ IH+X^- is -7 kcal./mole with HCl or HTs as HX and PNB as I.

Original language	English
Pages (from-to)	1-9
Number of pages	9
Journal	Journal of the American Chemical Society
Volume	78
Issue number	1
DOIs	https://doi.org/10.1021/ja01582a001
State	Published - Jan 1 1956

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title = "Acid-Base Equilibria in Glacial Acetic Acid. I. Spectrophotometric Determination of Acid and Base Strengths and of Some Dissociation Constants",

abstract = "The following constants are defined for an acid: ionization or ion-pair formation, [formula omitted] dissociation, [formula omitted]; and over-all dissociation, [formula omitted]. Similar constants are defined for bases. The formation constant of the salt of an (indicator) base, I, and an acid is given by [formula omitted]. The strength of an acid depends upon the kind of (indicator) base used for reference and vice versa. From spectrophotometric measurements at 25° with p-naphtholbenzein (PBN) as indicator base, the following constants have been derived: [formula omitted] (HTs = p-tolnenesulfonic acid), [formula omitted]. The heat of reaction of I + HX ⇄ IH+X- is -7 kcal./mole with HCl or HTs as HX and PNB as I.",

author = "Kolthoff, \{I. M.\} and S. Bruckenstein",

year = "1956",

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T1 - Acid-Base Equilibria in Glacial Acetic Acid. I. Spectrophotometric Determination of Acid and Base Strengths and of Some Dissociation Constants

AU - Kolthoff, I. M.

AU - Bruckenstein, S.

PY - 1956/1/1

Y1 - 1956/1/1

N2 - The following constants are defined for an acid: ionization or ion-pair formation, [formula omitted] dissociation, [formula omitted]; and over-all dissociation, [formula omitted]. Similar constants are defined for bases. The formation constant of the salt of an (indicator) base, I, and an acid is given by [formula omitted]. The strength of an acid depends upon the kind of (indicator) base used for reference and vice versa. From spectrophotometric measurements at 25° with p-naphtholbenzein (PBN) as indicator base, the following constants have been derived: [formula omitted] (HTs = p-tolnenesulfonic acid), [formula omitted]. The heat of reaction of I + HX ⇄ IH+X- is -7 kcal./mole with HCl or HTs as HX and PNB as I.

AB - The following constants are defined for an acid: ionization or ion-pair formation, [formula omitted] dissociation, [formula omitted]; and over-all dissociation, [formula omitted]. Similar constants are defined for bases. The formation constant of the salt of an (indicator) base, I, and an acid is given by [formula omitted]. The strength of an acid depends upon the kind of (indicator) base used for reference and vice versa. From spectrophotometric measurements at 25° with p-naphtholbenzein (PBN) as indicator base, the following constants have been derived: [formula omitted] (HTs = p-tolnenesulfonic acid), [formula omitted]. The heat of reaction of I + HX ⇄ IH+X- is -7 kcal./mole with HCl or HTs as HX and PNB as I.

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Acid-Base Equilibria in Glacial Acetic Acid. I. Spectrophotometric Determination of Acid and Base Strengths and of Some Dissociation Constants

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