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Crystallization of Supersaturated Sodium Acetate A supersaturated solution of sodium acetate is poured onto one small sodium acetate crystal. Crystals form from the liquid immediately upon contact with the seed crystal. A thermometer shows that the crystallization process is exothermic. A chemical hot pack is shown as an example of a commercially available supersaturated solution.
Precipitation / Solubility |
Solutions / Solvents |
Calorimetry / Thermochemistry
Solutions Reactions and demonstrations exploring the concepts of solutions.
Solutions : FreezePtDepression (20 Variations) It takes 6.86 kg of ethylene glycol (antifreeze) to decrease the freezing point of 6.50 kg of water to -25.0oF (-31.7oC). How much sodium chloride (NaCl) would it take to decrease the freezing point of 6.50 kg of water to -25.0oF? (Assuming all the salt will dissolve in that amount of water.)
Investigating Students' Ability To Transfer Ideas Learned from Molecular Animations of the Dissolution ProcessResa M. Kelly and Loretta L. Jones This study examines what features of the particulate nature of matter learned from viewing two animations of sodium chloride dissolution students would transfer to their descriptions of the participation of aqueous sodium chloride in a chemical reaction. Kelly, Resa M.; Jones, Loretta L. J. Chem. Educ.2008, 85, 303.
Aqueous Solution Chemistry |
Precipitation / Solubility |
Solutions / Solvents |
Constructivism
The Ultrasonic Soda Fountain: A Dramatic Demonstration of Gas Solubility in Aqueous SolutionsJohn E. Baur and Melinda B. Baur An ultrasonic bath is used to accelerate the rate at which carbonated beverages equilibrate with the atmosphere. The resulting fountain, which can reach heights in excess of 3 meters, is a dramatic demonstration of the solubility of gases in liquids. Baur, John E.; Baur, Melinda B. J. Chem. Educ.2006, 83, 577.
Aqueous Solution Chemistry |
Kinetics |
Physical Properties |
Solutions / Solvents |
Precipitation / Solubility
Computer Simulations of Salt SolubilityVictor M. S. Gil and João C. M. Paiva Computer Simulations of Salt Solubility provides an animated, visual interpretation of the different solubilities of related salts based on simple entropy changes associated with dissolution: configurational disorder and thermal disorder. Gil, Victor M. S.; Paiva, João C. M. J. Chem. Educ.2006, 83, 173.
Saturated and Supersaturated SolutionsEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Solutions / Solvents |
Precipitation / Solubility
Computer Simulations of Salt SolubilityVictor M. S. Gil, João C. M. Paiva Computer Simulations of Salt Solubility provides an animated, visual interpretation of the different solubilities of related salts based on simple entropy changes associated with dissolution: configurational disorder and thermal disorder. This animation can also help improve students conceptual understanding of chemical equilibrium before any quantitative interpretation of equilibrium constants is attempted.
Computational Chemistry |
Solutions / Solvents |
Thermodynamics |
Equilibrium |
Precipitation / Solubility
Measuring the Composition of a SolutionEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
