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4 Videos
34 Assessment Questions
5 Journal Articles
1 ACS Resources
40 Other Resources
Videos: First 3 results
The Stoichiometry group contains three groups: Exploding Soap Bubbles: Hydrogen + Oxygen; Acid-Base Titrations and Animation; and Redox Titration and Animation.
Gas Stoichiometry  
Gas is generated from one mole of liquid of solid and the volume is measured using a gas collection system.
Stoichiometry |
Exploding Soap Bubbles: Hydrogen + Oxygen  
Explosions of bubbles filled with only hydrogen and with varying ratios of hydrogen and oxygen are demonstrated.
Reactions |
Oxidation / Reduction |
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Assessment Questions: First 3 results
Atoms,_Molecules_and_Ions : MassInAlloy (10 Variations)
Gold is alloyed with other metals to make it less malleable. 10 karat gold is an alloy that is 41.7% gold. How much pure gold is in a 20. gram 10 karat gold ring?
Stoichiometry : GramMoleProblem (9 Variations)
Which sample contains the largest number of nitrogen atoms?
Stoichiometry : LimitingReagent (8 Variations)
The synthesis of urea by Frederich W??hler in 1825 began the decline of the idea that "organic" chemicals could only be made by living organisms as part of their biological processes.

AgOCN(aq) + NH4Cl(aq)AgCl(s) + NH2CONH2(aq)

If you perform this reaction and collect the following table of data, in which trial(s) is AgOCN clearly the limiting reactant?

Trial AgOCN used NH4Cl AgCl produced
1 20.4 mL 5.3 mL 2.4 g
2 20.3 mL 10.4 mL 4.3 g
3 20.6 mL 15.4 mL 6.2 g
4 20.5 mL 20.6 mL 8.2 g
5 20.4 mL 25.2 mL 10.2 g
6 20.3 mL 30.4 mL 10.3 g

The mL of AgOCN and NH4Cl are the initial amounts used, the mass of AgCl is how much was recovered from the reaction. (Hint: You do not need to do any calculations to answer this question.)

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Journal Articles: First 3 results.
Ionic Blocks  Richard S. Sevcik, Rex Gamble, Elizabet Martinez, Linda D. Schultz, and Susan V. Alexander
"Ionic Blocks" is a teaching tool designed to help middle school students visualize the concepts of ions, ionic compounds, and stoichiometry. It can also assist high school students in reviewing their subject mastery.
Sevcik, Richard S.; Gamble, Rex; Martinez, Elizabet; Schultz, Linda D.; Alexander, Susan V. J. Chem. Educ. 2008, 85, 1631.
Ionic Bonding |
Nomenclature / Units / Symbols |
Nonmajor Courses |
A mole of M&M's   Merlo, Carmela; Turner, Kathleen E.
Engaging students by asking the question: How thick would the layer of M&M candies be if we covered the continental United States with a mole of these candies? Compare this to a mole of water.
Merlo, Carmela; Turner, Kathleen E. J. Chem. Educ. 1993, 70, 453.
Stoichiometry |
The abundance of nuclides: A lab simulation using pennies  Hendrickson, Eric
The altered composition of pennies provides an opportunity for students to learn about atomic mass calculations.
Hendrickson, Eric J. Chem. Educ. 1988, 65, 986.
Atomic Properties / Structure |
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ACS Resources: 1 results
Avogadro?s Bubbly Adventure  
Small amounts of gases are soluble, or dissolve, in water.,Two of these gases are oxygen and carbon dioxide. For,example, carbon dioxide gas is what gives soft drinks their ?fizz?.,And fish use oxygen dissolved in water for their body chemistry,,much like humans do. When there is not enough oxygen dissolved in,the water, fish can ?suffocate?. In this activity students study the,solubility of gas in water at different temperatures to see whether temperature changes this property.
Gases |
Solutions / Solvents |
Precipitation / Solubility |
Other Resources: First 3 results
The Mole  Ed Vitz, John W. Moore
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
The Amount of Substance  Ed Vitz, John W. Moore
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Balancing Chemical Equations  Ed Vitz, John W. Moore
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
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