Spectrophotometric determination of dissociation constants for propionic acid and 2,5-dinitrophenol at elevated temperatures

In Ja Lee; Gang Sook Jung; Keon Kim

doi:10.1007/BF00974181

Spectrophotometric determination of dissociation constants for propionic acid and 2,5-dinitrophenol at elevated temperatures

In Ja Lee, Gang Sook Jung, Keon Kim

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

14 Citations (Scopus)

Abstract

Using the temperature dependence of pK_a for acetic acid, the pK_a for 2,5-dinitrophenol have been spectrophotometrically determined in acetate buffer at elevated temperatures under the saturation vapor pressures. For 2,5-dinitrophenol {Mathematical expression} where T is in Kelvin. Similarly, pK_a values of propionic acid were obtained at temperatures from 25°C to 175°C producing {Mathematical expression} From this result, several thermodynamic functions of propionic acid were calculated and compared with those obtained from emf measurement.

Original language	English
Pages (from-to)	1283-1292
Number of pages	10
Journal	Journal of Solution Chemistry
Volume	23
Issue number	12
DOIs	https://doi.org/10.1007/BF00974181
Publication status	Published - 1994 Dec

Keywords

2,5-dinitrophenol
acid dissociation constant
optical indicator
p K
pH
propionic acid
thermodynamic function

ASJC Scopus subject areas

Biophysics
Biochemistry
Molecular Biology
Physical and Theoretical Chemistry

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10.1007/BF00974181

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@article{f0e822beb33f4b2ab470faf0a3773e84,

title = "Spectrophotometric determination of dissociation constants for propionic acid and 2,5-dinitrophenol at elevated temperatures",

abstract = "Using the temperature dependence of pKa for acetic acid, the pKa for 2,5-dinitrophenol have been spectrophotometrically determined in acetate buffer at elevated temperatures under the saturation vapor pressures. For 2,5-dinitrophenol {Mathematical expression} where T is in Kelvin. Similarly, pKa values of propionic acid were obtained at temperatures from 25°C to 175°C producing {Mathematical expression} From this result, several thermodynamic functions of propionic acid were calculated and compared with those obtained from emf measurement.",

keywords = "2,5-dinitrophenol, acid dissociation constant, optical indicator, p K, pH, propionic acid, thermodynamic function",

author = "Lee, {In Ja} and Jung, {Gang Sook} and Keon Kim",

year = "1994",

month = dec,

doi = "10.1007/BF00974181",

language = "English",

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pages = "1283--1292",

journal = "Journal of Solution Chemistry",

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T1 - Spectrophotometric determination of dissociation constants for propionic acid and 2,5-dinitrophenol at elevated temperatures

AU - Lee, In Ja

AU - Jung, Gang Sook

AU - Kim, Keon

PY - 1994/12

Y1 - 1994/12

N2 - Using the temperature dependence of pKa for acetic acid, the pKa for 2,5-dinitrophenol have been spectrophotometrically determined in acetate buffer at elevated temperatures under the saturation vapor pressures. For 2,5-dinitrophenol {Mathematical expression} where T is in Kelvin. Similarly, pKa values of propionic acid were obtained at temperatures from 25°C to 175°C producing {Mathematical expression} From this result, several thermodynamic functions of propionic acid were calculated and compared with those obtained from emf measurement.

AB - Using the temperature dependence of pKa for acetic acid, the pKa for 2,5-dinitrophenol have been spectrophotometrically determined in acetate buffer at elevated temperatures under the saturation vapor pressures. For 2,5-dinitrophenol {Mathematical expression} where T is in Kelvin. Similarly, pKa values of propionic acid were obtained at temperatures from 25°C to 175°C producing {Mathematical expression} From this result, several thermodynamic functions of propionic acid were calculated and compared with those obtained from emf measurement.

KW - 2,5-dinitrophenol

KW - acid dissociation constant

KW - optical indicator

KW - p K

KW - pH

KW - propionic acid

KW - thermodynamic function

UR - http://www.scopus.com/inward/record.url?scp=21844526285&partnerID=8YFLogxK

U2 - 10.1007/BF00974181

DO - 10.1007/BF00974181

M3 - Article

AN - SCOPUS:21844526285

SN - 0095-9782

VL - 23

SP - 1283

EP - 1292

JO - Journal of Solution Chemistry

JF - Journal of Solution Chemistry

IS - 12

ER -

Spectrophotometric determination of dissociation constants for propionic acid and 2,5-dinitrophenol at elevated temperatures

Abstract

Keywords

ASJC Scopus subject areas

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