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The Chemical Educator

ISSN: 1430-4171 (electronic version)

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Abstract Volume 9 Issue 1 (2004) pp 24-26

Two Consecutive Reactions in Biphase Systems

Muhamad Hugerat,*, Sobhi Basheer, and Peter Schwarz

The Arab College for Education in Israel, Haifa22 Hachashmal St., Haifa 33145, P.O. Box 8349, Haifa, Israel and Institute for Didactics of Chemistry, Kassel University, Germany,
Received October 28, 2003. Accepted December 9, 2003.

Published online: 22 January 2004

Abstract. In these laboratory experiments, two different types of one-pot consecutive reactions are presented. The first is the electrolysis of water producing hydroxide ions, which react further to break down the ester linkage of triglycerides that constitute an edible oil and form fatty acid salts. The second is the electrolysis of sodium chloride solution, which forms chlorine gas that reacts further with the double bonds of the unsaturated fatty acyl groups in the triglycerides of the used oil to form a saturated semisolid oil (a margarine-like substance). Also, different combinations of salt solutions contained in electrolysis cells are used to form various chemical species that react further differently with unsaturated oil triglycerides.

Key Words: Laboratories and Demonstrations; general chemistry; electrochemistry; consecutive reactions; biphase systems; interface

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Issue date: February 1, 2004

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