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Zhao, H., Holladay, J.E., Kwak, J.H. and Zhang, Z.C., "Inverse temperature-dependent pathway of cellulose decrystallization in trifluoroacetic acid," J. Phys. Chem. B, 111 (19). 5295-5300. Oct. 2007.

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Article

Where is the Border Line between Strong Acids and Weak Acids?

1Department of Science Education, Naruto University of Education, Naruto, Tokushima, Japan


World Journal of Chemical Education. 2013, Vol. 1 No. 1, 12-16
DOI: 10.12691/wjce-1-1-4
Copyright © 2013 Science and Education Publishing

Cite this paper:
Toratane Munegumi. Where is the Border Line between Strong Acids and Weak Acids?. World Journal of Chemical Education. 2013; 1(1):12-16. doi: 10.12691/wjce-1-1-4.

Correspondence to: Toratane  Munegumi, Department of Science Education, Naruto University of Education, Naruto, Tokushima, Japan. Email: tmunegumi@naruto-u.ac.jp

Abstract

The strength of an acid is generally discussed as a unique feature of the acid itself according to its chemical structure. Strong acids have a lower pKa value, and weak acids have a higher one. In the classrooms of high schools and universities, we sometimes use the technical terms “strong acid” and “weak acid”. However, there are some acids for which it is very difficult to say, from their pKa values, whether they are strong or weak. This research addresses the distinction between strong acids and weak acids, in a restricted initial concentration of acids, to provide a clear distinction between strong acids and weak acids.

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