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Applicability of excess acidity functions in low-acidity media (1991)

García, Begoña ; Leal, José M.

Chichester : Wiley-Blackwell

Journal of Physical Organic Chemistry 4 (1991), S. 413-419

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ISSN: 0894-3230

Keywords: Organic Chemistry ; Physical Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology , Physics

Notes: It is demonstrated that excess acidity functions do not correspond well to the pH scale in dilute solutions. Acidity constants, pKBH+, of seven moderately weak bases were determined; they were calculated by means of excess acidity functions, since the corresponding ionizations occur at acidity levels where the pH scale is partly used. The excess acidity method permitted extrapolation of measurements made in concentrated acids down to dilute solutions only up to about 5% (w/w) perchloric acid.

Additional Material: 2 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/poc.610040704

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