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An Introductory Laboratory Exercise on Solution Preparation: A Rewarding Experience

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M. Rachel Wang

Department of Chemistry, Spokane Community College, Spokane, WA 99207

J. Chem. Educ., 2000, 77 (2), p 249

DOI: 10.1021/ed077p249

Publication Date (Web): February 1, 2000

Section:

History, Education, and Documentation

Abstract

This exercise provides beginning students a firsthand experience in solution preparation. It can be completed within two hours. The format of the student handout promotes active learning in the laboratory by having text and questions interspersed among laboratory procedures. This exercise has been used successfully in various introductory courses I have taught for more than 14 years. Factors contributing to its effectiveness include (i) students are motivated to prepare solutions for the fascinating Briggs-Rauscher (BR) oscillation reaction; (ii) the exercise involves a variety of situations commonly encountered in solution preparation; (iii) the challenge of demonstrating the BR reaction seems to be at the appropriate level for beginning students, and meeting the challenge is a rewarding experience and serves as a measure of success in solution preparation; (iv) the exercise lends itself to further take-home studies suitable for different types of introductory chemistry courses.

Keywords (Audience):

High School / Introductory Chemistry

Keywords (Domain):

Laboratory Instruction

Keywords (Pedagogy):

Hands-On Learning / Manipulatives

Keywords (Subject):

Solutions / Solvents

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