Ionic crystals: A simple and safe lecture demonstration of the preparation of NaI from its elements

Zelek S. Herman
521 Del Medio Avenue, #107, Mountain View, CA 94040-1146
Tom Hanninen
Department of Chemistry, Kutztown University, Kutztown, PA 19530
Paul Krause
Department of Chemistry, University of Central Arkansas, Conway, AR 72032
J. Chem. Educ., 2000, 77 (5), p 619
DOI: 10.1021/ed077p619
Publication Date (Web): May 1, 2000
History, Education, and Documentation

Abstract

A simple and safe classroom demonstration showing the production of sodium iodide (NaI) crystals from elemental sodium and elemental (molecular) iodine is presented. The demonstration, which is quite impressive, naturally fits into the discussion of ionic bonding and the alkali halide crystals. It is best suited for a classroom or laboratory containing fewer than 75 students. Suggestions are made for using the product in other topics covered in the course.

Keywords (Audience):

High School / Introductory Chemistry

Keywords (Domain):

Demonstrations

Keywords (Feature):

Tested Demonstrations

Keywords (Subject):

Crystals / Crystallography
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  • Received: August 03, 2009

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