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A Puzzle Concerning Solution Equilibria

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Peter Gans

School of Chemistry, The University of Leeds, Leeds LS2 9JT, England (UK)

J. Chem. Educ., 2000, 77 (4), p 489

DOI: 10.1021/ed077p489

Publication Date (Web): April 1, 2000

Section:

History, Education, and Documentation

Abstract

It is well known that half-neutralization of a weak acid occurs when the pH of a solution of the acid is adjusted to be numerically equal to pK_a (K_a is the dissociation constant of the acid). Under those conditions the concentrations of the two species, the acid and its conjugate base, are equal. A puzzle is presented, which is designed to reinforce understanding of simple acid-base equilibria and to give students an introduction to more complicated equilibria.

Keywords (Audience):

Second-Year Undergraduate

Keywords (Domain):

Inorganic Chemistry

Keywords (Feature):

Resources for Student Assessment

Keywords (Pedagogy):

Textbooks / Reference Books

Keywords (Subject):

Aqueous Solution Chemistry

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Received: August 03, 2009

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A Puzzle Concerning Solution Equilibria

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Classroom Nomenclature Games—BINGO

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