The Chemical Educator
ISSN: 1430-4171 (electronic version)
Abstract Volume 10
Issue 4 (2005) pp 248-249
Solving the Puzzle for the Chemical Formula from Constituent Ions: Putting the Pieces Together
Michele R. Harris* and James M. Garrett
Stephen F. Austin State University, Nacogdoches,
Published online: 8 June 2005
Abstract. We present a simple, brief visual aid for majors or nonmajors and a hands-on activity for nonmajors or high school students involving ionic puzzle pieces. The exercise assists students in determining the correct stoichiometry of ionic compounds. Puzzle pieces representing various cations and anions are constructed from overhead transparencies for the visual aid and from brightly colored card stock for the hands-on activity. These puzzle pieces are used to demonstrate how different ions must pair to maintain a neutral charge balance when forming ionic compounds.
Key Words: Laboratories and Demonstrations; general chemistry; high school chemistry; nonmajors; puzzles
(*) Corresponding author. (E-mail: firstname.lastname@example.org)
Copies of the master sheets of ions discussed in this paper are included in a Zip file as supporting material (38 KB).
Issue date: August 1, 2005