Spectrophotometric determination of the acid dissociation constants for cacodylic acid and p-nitrophenol at elevated temperatures

Tae Wook Shin; Keon Kim; In Ja Lee

doi:10.1007/BF02767677

Spectrophotometric determination of the acid dissociation constants for cacodylic acid and p-nitrophenol at elevated temperatures

Tae Wook Shin, Keon Kim, In Ja Lee

* Honorary professors

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

12 Citations (Scopus)

Abstract

Using 2,5-dinitrophenol as an optical indicator, the pK_a of cacodylic acid were spectrophotometrically determined at elevated temperatures under saturation vapor pressures. The result is pK_a = -26.41 + 1296/T + 4.973 In T where T is in Kelvin. In a similar way, the pK_a of p-nitrophenol were obtained up to 200°C giving pK_a = -24.82 + 2135/T + 4.353 In T From these results, several thermodynamic functions of cacodylic acid and p-nitrophenol were calculated.

Original language	English
Pages (from-to)	379-390
Number of pages	12
Journal	Journal of Solution Chemistry
Volume	26
Issue number	4
DOIs	https://doi.org/10.1007/BF02767677
Publication status	Published - 1997 Apr

Bibliographical note

Funding Information:
This paper was supported by the Non Directed Research Fund, Korea Research Foundation, 1994.

Keywords

2,5-dinitrophenol
Acid dissociation constant
Cacodylic acid
Thermodynamic function
p-nitrophenol
pH
pK

ASJC Scopus subject areas

Biophysics
Biochemistry
Molecular Biology
Physical and Theoretical Chemistry

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10.1007/BF02767677

Cite this

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title = "Spectrophotometric determination of the acid dissociation constants for cacodylic acid and p-nitrophenol at elevated temperatures",

abstract = "Using 2,5-dinitrophenol as an optical indicator, the pKa of cacodylic acid were spectrophotometrically determined at elevated temperatures under saturation vapor pressures. The result is pKa = -26.41 + 1296/T + 4.973 In T where T is in Kelvin. In a similar way, the pKa of p-nitrophenol were obtained up to 200°C giving pKa = -24.82 + 2135/T + 4.353 In T From these results, several thermodynamic functions of cacodylic acid and p-nitrophenol were calculated.",

keywords = "2,5-dinitrophenol, Acid dissociation constant, Cacodylic acid, Thermodynamic function, p-nitrophenol, pH, pK",

author = "Shin, {Tae Wook} and Keon Kim and Lee, {In Ja}",

note = "Funding Information: This paper was supported by the Non Directed Research Fund, Korea Research Foundation, 1994.",

year = "1997",

month = apr,

doi = "10.1007/BF02767677",

language = "English",

volume = "26",

pages = "379--390",

journal = "Journal of Solution Chemistry",

issn = "0095-9782",

publisher = "Springer New York",

number = "4",

}

TY - JOUR

T1 - Spectrophotometric determination of the acid dissociation constants for cacodylic acid and p-nitrophenol at elevated temperatures

AU - Shin, Tae Wook

AU - Kim, Keon

AU - Lee, In Ja

N1 - Funding Information: This paper was supported by the Non Directed Research Fund, Korea Research Foundation, 1994.

PY - 1997/4

Y1 - 1997/4

N2 - Using 2,5-dinitrophenol as an optical indicator, the pKa of cacodylic acid were spectrophotometrically determined at elevated temperatures under saturation vapor pressures. The result is pKa = -26.41 + 1296/T + 4.973 In T where T is in Kelvin. In a similar way, the pKa of p-nitrophenol were obtained up to 200°C giving pKa = -24.82 + 2135/T + 4.353 In T From these results, several thermodynamic functions of cacodylic acid and p-nitrophenol were calculated.

AB - Using 2,5-dinitrophenol as an optical indicator, the pKa of cacodylic acid were spectrophotometrically determined at elevated temperatures under saturation vapor pressures. The result is pKa = -26.41 + 1296/T + 4.973 In T where T is in Kelvin. In a similar way, the pKa of p-nitrophenol were obtained up to 200°C giving pKa = -24.82 + 2135/T + 4.353 In T From these results, several thermodynamic functions of cacodylic acid and p-nitrophenol were calculated.

KW - 2,5-dinitrophenol

KW - Acid dissociation constant

KW - Cacodylic acid

KW - Thermodynamic function

KW - p-nitrophenol

KW - pH

KW - pK

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U2 - 10.1007/BF02767677

DO - 10.1007/BF02767677

M3 - Article

AN - SCOPUS:0031517172

SN - 0095-9782

VL - 26

SP - 379

EP - 390

JO - Journal of Solution Chemistry

JF - Journal of Solution Chemistry

IS - 4

ER -

Spectrophotometric determination of the acid dissociation constants for cacodylic acid and p-nitrophenol at elevated temperatures

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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