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Phosphate Buffers and Telephone Poles - A Useful Analogy with Limitations

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Edwin S. Gould

Department of Chemistry, Kent State University, Kent, OH 44242

J. Chem. Educ., 1999, 76 (11), p 1511

DOI: 10.1021/ed076p1511

Publication Date (Web): November 1, 1999

Abstract

A visual aid is presented to help general chemistry students establish the major phosphorus species in buffer solutions made from partial neutralizations of phosphoric acid and to estimate concentrations. The representation is applicable to the pH regions near pK₁ and pK₂ and to concentrated solutions near pK_a, but not to dilute solutions near pK_a.

Keywords (Audience):

High School / Introductory Chemistry

Keywords (Domain):

Inorganic Chemistry

Keywords (Pedagogy):

Analogies / Transfer

Keywords (Subject):

Aqueous Solution Chemistry

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Received: August 03, 2009

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Phosphate Buffers and Telephone Poles - A Useful Analogy with Limitations

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Related Content

Understanding, Deriving, and Computing Buffer Capacity

Predicting Acid-Base Titration Curves without Calculations

Buffer Index and Buffer Capacity for a Simple Buffer Solution

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