CHED 753 |
| Job's plot of continuous variations is a technique for determining the coordination number of a complex ion, where the absorbance of the complex ion is plotted as a function of the mole fraction of the ligand and metal ion. The presence of two independent variables in a Job's Plot makes this experiment exceptionally difficult for students to derive in an inquiry based laboratory environment. We created a freshmen level learning-object centered activity using molecular models to derive the experimental procedures. Initially students developed an understanding of the experiment using molecular models, the learning object, and then used their concepts to design and run an experiment using actual solutions. In evaluating the data misconceptions were identified which could be induced by the learning-object centered activity . Subsequently, the procedures were modified to confront these potential learning-object induced misconceptions. The results of this work will be discussed. |
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POGIL: Process Oriented Guided Inquiry Learning
1:30 PM-4:45 PM, Monday, April 7, 2008 Hilton New Orleans Riverside -- Magnolia, Oral
Division of Chemical Education |