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A Simple Laboratory-Constructed Automatic Titrator

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Kurt L. Headrick , Terry K. Davies and Aaron N. Haegele

Department of Chemistry, University of Victoria, Victoria, BC V8W 3V6, Canada

J. Chem. Educ., 2000, 77 (3), p 389

DOI: 10.1021/ed077p389

Publication Date (Web): March 1, 2000

Section:

History, Education, and Documentation

Abstract

The construction of a simple automatic titrator is described. The buret is replaced with a metering pump to provide a constant flow of titrant. The output from the pH meter is sent to a recorder via a laboratory-constructed differentiator, allowing the results to be plotted as potential versus time, first or second derivative. The pump and recorder are plugged in to a standard power bar; turning the power bar on and off starts and stops the titration. Results obtained with the automatic titrator for the titration of sodium carbonate with HCl are as good as or better than those obtained with manual titration or commercial autotitrators.

Keywords (Audience):

First-Year Undergraduate / General

Keywords (Domain):

Analytical Chemistry

Keywords (Subject):

Instrumental Methods

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This article has been cited by 2 ACS Journal articles (2 most recent appear below).

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Journal of Chemical Education2003 80 (11), 1311
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Melissa A. Thal , Michael J. Samide
Journal of Chemical Education2001 78 (11), 1510
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