Three Titration Experiments Involving 1,2-Propanediamine and Utilizing Computer Data Collection

TCE

The Chemical Educator

ISSN: 1430-4171 (electronic version)

Table of Contents

Abstract Volume 13 Issue 1 (2007) pp 19-21

Three Titration Experiments Involving 1,2-Propanediamine and Utilizing Computer Data Collection

Donald C. Bowman* and Elizabeth A. Pfister

Department of Science, Math, and Engineering, Central Virginia Community College, Lynchburg, VA 24502; bowmand@cvcc.vccs.edu
Received March 14, 2007. Accepted August 18, 2007.

Published online: 30 November 2007

Abstract. Three titration experiments involving the polyfunctional base 1,2-propanediamine are described. The experiments can be performed alone or used in combination. Both Bronsted-Lowry acid–base theory and Lewis acid–base theory are involved. The concept of speciation (the unprotonated, monoprotonated, or diprotonated form of 1,2-propanediamine present in solution) depending on ionic strength of solution is discussed. Data collection is by computer interface with a pH probe.

Key Words: Laboratories and Demonstrations; general chemistry; quantitative analysis

(*) Corresponding author. (E-mail: bowmand@cvcc.vccs.edu)

Article in PDF format (105 KB) HTML format

Supporting Materials:

Student handouts for the three experiments are available in a Zip file (326 KB).