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  Home > JCE Print > Journal of Chemical Education > Issues > 2000  > April  >
In the Classroom
Resources for Student Assessment
A Puzzle Concerning Solution Equilibria
Peter Gans
School of Chemistry, The University of Leeds, Leeds LS2 9JT, England (UK)
Cover
April 2000
Vol. 77 No. 4
p. 489
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 pKa (Ka 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.
More Information
*  Citation
 Gans, Peter. J. Chem. Educ. 2000 77 489.
*  Keywords
 Aqueous Solution Chemistry; Inorganic Chemistry; Equilibrium; Teaching / Learning Aids
*  History
 Created:
Last Updated:		 March 2, 2000
April 15, 2005
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