15.5 Pressure and Dissolving Gases in Liquids: Henry's Law
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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.)
A Hand-Held Ammonia FountainNicholas C. Thomas and Stephen Faulk A plastic juice bottle, filled with ammonia gas generated by combining aqueous ammonia and sodium hydroxide, provides a convenient demonstration of the ammonia fountain and gas solubility. Thomas, Nicholas C.; Faulk, Stephen. J. Chem. Educ.2008, 85, 1063.
Aqueous Solution Chemistry |
Gases |
Solutions / Solvents
Using Hydrogen Balloons To Display Metal Ion SpectraJames H. Maynard Describes a procedure for igniting hydrogen-filled balloons containing metal salts to obtain the brightest possible flash while minimizing the quantity of airborne combustion products. Maynard, James H. J. Chem. Educ.2008, 85, 519.
Atomic Properties / Structure |
Atomic Spectroscopy |
Gases |
Metals |
Solutions / Solvents
Determining the Pressure inside an Unopened Carbonated BeverageHans de Grys Determining the pressure of carbon dioxide inside a sealed soft drink can represents a challenging student exercise. Several methods are discussed for solving the problem, including applying the ideal gas law, gas collection via water displacement, and Henry's law. de Grys, Hans. J. Chem. Educ.2007, 84, 1117.
Characteristics of MaterialsAmerican Chemical Society What makes diapers absorbent? Is peanut butter stickier than syrup or jelly? Strong, stretchy, sticky, or sweet—everything around us has special properties which make them unique. See if you can identify and compare the characteristics of materials.
Industrial Chemistry |
Physical Properties |
Reactions |
Consumer Chemistry |
Gases |
Carbohydrates |
Proteins / Peptides |
Crystals / Crystallography |
Water / Water Chemistry |
Plant Chemistry |
Dyes / Pigments |
Lipids |
Molecular Properties / Structure |
Applications of Chemistry |
Nutrition |
Acids / Bases |
Chromatography |
Magnetic Properties |
Metals |
Polymerization |
Solutions / Solvents |
Descriptive Chemistry |
Food Science
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.
