JCE Online Journal of Chemical EducationDivision of Chemical Education, American Chemical SocietyAmerican Chemical Society
 | Subscriptions  | Software Orders  | Support  | Contributors  | Advertisers  | 

JCE Print
   Current Issue
 Previous Issues
 Supplements
 Search JCE Index

JCE Digital Library
   JCEDLib Catalogue
   ChemInfo
 Data-Driven Exercises
 DigiDemos
 Featured Molecules
 LivTexts
 LrnCom
 QBank
 SymMath
 WebWare

JCE Software
   Latest Releases
 Software & Video
 Downloads
 Support

Only@JCE Online
   JCE Online Store
 JCE HS CLIC
 JCE Discussion Forums
   Biographical Snapshots
 ChemEd Resource Shelf
 Featured Molecules
 Hal's Picks
 Project Chemlab
 Reviewed WWW Sites
 "Web-Ed" Articles

About JCE
   Features
 Publications
 Operations
 Outreach
 Contact Us


  Home > JCE Print > Journal of Chemical Education > Issues > 2006  > April  >
In the Laboratory
What Happens When Chemical Compounds Are Added to Water? An Introduction to the Model–Observe–Reflect–Explain (MORE) Thinking Frame
Adam C. Mattox and Barbara A. Reisner
Department of Chemistry, James Madison University, Harrisonburg, VA 22807

Dawn Rickey
Department of Chemistry, Colorado State University, Fort Collins, CO 80523

Cover
April 2006
Vol. 83 No. 4
p. 622
Abstract
This article describes a laboratory module designed to help students understand how different compounds behave when they are dissolved in water. Students measure the conductivities of various aqueous solutions using handheld conductivity testers with LED displays. By counting the number of LEDs illuminated, students can differentiate between electrolytes and nonelectrolytes and approximate the relative numbers of ions in solution. This enables students to discover how ionic compounds dissociate when dissolved in water. The laboratory module introduces the model–observe–reflect–explain (MORE) thinking frame, an instructional tool that encourages students to connect their macroscopic observations with their understanding of the behavior of particles at the molecular level. These activities are designed for college-level general chemistry courses, but have also been adapted to the high-school level.
Supplement
Student handouts for a college-level general chemistry course, required supplies, sample results, instructor notes, examples of student work, and suggestions for grading are available.
*  Contents JCE2006p0622W.doc (Microsoft Word)
*  Download
JCE2006p0622W.pdf

JCE2006p0622W.zip
More Information
*  Citation
 Mattox, Adam C.; Reisner, Barbara A.; Rickey, Dawn. J. Chem. Educ. 2006 83 622.
*  Keywords
 Aqueous Solution Chemistry; Conductivity; First-Year Undergraduate / General; Hands-On Learning / Manipulatives; High School / Introductory Chemistry; Inquiry-Based / Discovery Learning; Ionic Bonding; Laboratory Instruction; Solutions / Solvents; Stoichiometry
*  History
 Created:
Last Updated:		 2/24/2006
3/6/2006
<< Previous Article Table of Contents Next Article >>
  Home > JCE Print > Journal of Chemical Education > Issues > 2006  > April  > Page 622



Chemistry Teacher Connection

The "Chemistry Teacher Connection" (CTC) is especially for high school chemistry teachers. For only $40/year, it offers an online-only subscription to CLIC along with membership in the Division of Chemical Education, normally $65/year. CTC subscribers receive access to all articles and supplements from 1996 through the current issue.
More About CTC
Order the Chemistry Teacher Connection

C&EN CLICs

Through special arrangement with the ACS, JCE High School CLIC is now able to provide subscribers with online access to Chemical & Engineering News articles that have been selected specifically for secondary science instructors and their students. 
 C&EN CLICs

JCE Collections Available
Occasionally, collections of JCE back issues become available for donation to individual teachers, schools, or libraries. JCE matches collections with interested recipients. Recipients pay shipping costs or pick up the collection.
 List of available collections

Contributions Welcome
JCE welcomes your submission
 Contributors's Corner

Subscriptions
 Subscription Info
 Order Forms

Fishing for New Ideas
Always in the
process of
improving, CLIC
welcomes ideas and comments.

Email Us

Comments to
jceonline@chem.wisc.edu		 Copyright © Division of Chemical Education, Inc., American Chemical Society.
All rights reserved.