A Clock Reaction Sympathetic Ink from Consumer Chemicals

Stephen W. Wright
Pfizer Global Research and Development, Groton, CT 06340
Marsha R. Folger and Matthew A. Rice
Lyme-Old Lyme High School, Old Lyme, CT 06371
Kyle B. Yeakel
Department of Chemistry, Kutztown University, Kutztown, PA 19530
Michael D. Roadruck
Ottawa Hills High School, Toledo, OH 43606
J. Chem. Educ., 2006, 83 (10), p 1473
DOI: 10.1021/ed083p1473
Publication Date (Web): October 1, 2006
History, Education, and Documentation

Abstract

A sympathetic ink is described that uses a "clock reaction" between hydrogen peroxide and ascorbic acid (Vitamin C) to cause the writing to appear after predictable and controllable periods of time. The experiment is conducted using inexpensive chemicals that are commonly available to the consumer on the retail market.

Keywords (Audience):

Elementary / Middle School Science

Keywords (Domain):

Demonstrations

Keywords (Feature):

JCE DigiDemos: Tested Demonstrations

Keywords (Pedagogy):

Distance Learning / Self Instruction

Keywords (Subject):

Consumer Chemistry
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History

  • Received: August 03, 2009

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