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  Home > JCE Print > Journal of Chemical Education > Issues > 2007  > October  >
In the Laboratory
The Empirical Formula of Silver Sulfide
An Experiment for Introductory Chemistry
Carlos Alexander Trujillo
Departamento de Química, Universidad Nacional de Colombia, Ciudad Universitaria, Cra. 30 45-03 Bogotá, Colombia
Cover
October 2007
Vol. 84 No. 10
p. 1682

Abstract
An experiment is described that allows students to experimentally determine an empirical formula for silver sulfide. At elevated temperatures, silver sulfide reacts in air to form silver, silver sulfate, and sulfur dioxide. At higher temperatures (∼960 8C) silver sulfate decomposes to produce metallic silver.
Supplement
Instructions for the students and notes for the instructor are available.
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Citation
Trujillo, Carlos Alexander. J. Chem. Educ. 2007, 84, 1682.
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Keywords
First-Year Undergraduate / General; Gravimetric Analysis; Hands-On Learning / Manipulatives; High School / Introductory Chemistry; Laboratory Instruction; Quantitative Analysis; Thermal Analysis
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History
Created:
Last Updated:
8/20/2007
9/7/2007
 Caution! 
Experiments, laboratory exercises, lecture demonstrations, and other descriptions of the use of chemicals, apparatus, instruments, computers, and computer interfaces are presented in the Journal of Chemical Education as illustrative of new or improved ideas or concepts in chemistry instruction and are directed at qualified teachers. Although every effort is made to assure and encourage safe practices and safe use of chemicals, the Journal of Chemical Education cannot assume responsibility for uses made of its published materials. Many chemicals are hazardous. Precautions for the safe use of hazardous chemicals and directions for their proper disposal are described in the Material Safety Data Sheets and on the labels. We strongly urge all those planning to use materials from our pages to make choices and to develop procedures for laboratory and classroom safety in accordance with local needs and situations.
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