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Dr. Miriam Douglass
Dr. Martin McClinton
In this interactive object, learners determine the limiting reagent and the excess reagent in chemical reactions. Learners test their knowledge by solving three problems.
Reading a Triple Beam Balance
By Jill Crowder
Students identify the parts of a triple beam balance and practice measuring the mass of objects.
Balancing Oxidation-Reduction Equations
By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton
In this animated activity, learners examine the terms "half-reaction," "oxidizing agent," and "reducing agent" and follow five interactive examples to balance equations for oxidation-reduction reactions. Three problems are provided as a self-check.
Double Replacement Reactions
By Jill Larson
In this interactive object, learners identify charges on ions, write new formulas based on charge, and balance equations using coefficients.
Changes in Our World: Chemical and Physical (Video)
By Deb Simonson
In this screencast, learners examine the kinds of physical and chemical changes that occur in substances.
why rinse filter paper which filtered copper(ii)susupernatant with distilled water
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