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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.
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.)
Freezing Point of Milk: A Natural Way To Understand Colligative PropertiesMercedes Novo, Belén Reija, and Wajih Al-Soufi Presents a laboratory experiment that illustrates the use of freezing point measurements to control milk quality and determine molecular weight. Novo, Mercedes; Reija, Belén; Al-Soufi, Wajih. J. Chem. Educ.2007, 84, 1673.
Molecular Handshake: Recognition through Weak Noncovalent InteractionsParvathi S. Murthy This article traces the development of our thinking about molecular recognition through noncovalent interactions, highlights their salient features, and suggests ways for comprehensive education on this important concept. Murthy, Parvathi S. J. Chem. Educ.2006, 83, 1010.
Colligative Properties of SolutionsEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Solutions / Solvents |
Physical Properties
SolutionsEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Solutions / Solvents
Measuring the Composition of a SolutionEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
