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A Simple Method for Comparing the Acidity of Different pH Values
Author(s) -
Stephenson R. E.
Publication year - 1926
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1926.00021962001800060009x
Subject(s) - citation , simple (philosophy) , soil water , computer science , mathematics , information retrieval , library science , soil science , environmental science , philosophy , epistemology
In reaction studies employing the colorimetric method, pH values are obtained at intervals of tenths pH. The pH, sometimes called the hydrogen-ion exponent or Sorensen number, is the logarithm of the reciprocal of the hydrogen-ion concentration. Consequently, in order to compare reactions, it is necessary to convert pH into normalities of hydrogen-ion. The calculation is not difficult, but requires considerable work. A scheme sometimes used is that of Wherry in which he expresses neutrality, or pH 7, as specific acidity or specific alkalinity equal to one. Specific acidity, then, increases in multiples of 10 for each integral increase in pH value as follows: