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Videos: 33 results
Enthlapy-Thermodynamics  
Reactions and demonstrations the explore thermodynamic concepts.
Precipitation / Solubility |
Solutions / Solvents |
Calorimetry / Thermochemistry |
Applications of Chemistry |
Acids / Bases |
Physical Properties |
Reactions |
Thermodynamics |
Gases |
Phases / Phase Transitions / Diagrams |
Water / Water Chemistry |
Liquids |
Solids |
pH |
Consumer Chemistry |
Kinetics |
Oxidation / Reduction
Solids-Liquids  
Reactions and demonstrations exploring the properties of solids and liquids.
Solids |
Liquids
Boiling by Cooling  
A flask contains water and water vapor at 100C. Each time ice water is poured over the outside of the flask, the water inside the flask boils. Although the temperature of the water in the flask has decreased, in each instance boiling is observed.
Gases |
Liquids |
Phases / Phase Transitions / Diagrams
Vapor Pressure: Molecular Size  
The measurement of pressure exerted by a vapor is demonstrated using barometers. Vapor pressure varies with the strength of the intermolecular forces in the liquid.
Gases |
Liquids |
Noncovalent Interactions |
Phases / Phase Transitions / Diagrams |
Physical Properties
Vapor Pressure of a Mixture: Raoult's Law  
The measurement of pressure exerted by a vapor is demonstrated using barometers. Vapor pressure varies with the strength of the intermolecular forces in the liquid. In this section we will look at vapor pressure of mixtures. We can calculate the vapor pressure of a mixture using Raoult's law.
Gases |
Liquids |
Noncovalent Interactions |
Phases / Phase Transitions / Diagrams |
Physical Properties
Solutions  
Reactions and demonstrations exploring the concepts of solutions.
Noncovalent Interactions |
Physical Properties |
Precipitation / Solubility |
Solutions / Solvents |
Calorimetry / Thermochemistry |
Applications of Chemistry |
Acids / Bases |
Aqueous Solution Chemistry |
pH |
Conductivity |
Reactions |
Titration / Volumetric Analysis |
Liquids |
Solids |
Equilibrium |
Transport Properties
Scattering and Absorption of Light  
The effects of passing light through a colloidal suspension of milk in water and through a solution of copper sulfate are shown.
Colloids |
Physical Properties |
Liquids
Viscosity of Liquids  
The viscosities of water, 2-propanol (rubbing alcohol), ethylene glycol (antifreeze) and vegetable oil are compared. The viscosities of water, hexane, octane, 2,2,4-trimethylpentane and 1-pentanol are measured.
Liquids |
Physical Properties
Electrical Conductivity-Liquids  
The conductivity of liquids are tested.
Conductivity |
Liquids |
Physical Properties
Simulation of Dislocations in Metals  
An array of soap bubbles is used to simulate a close-packed arrangement of atoms in a metal crystal.
Metallic Bonding |
Metals |
Solids
Electrical Conductivity-Solids  
The conductivity of various solids are tested.
Conductivity |
Solids |
Physical Properties
Gas Stoichiometry  
Gas is generated from one mole of liquid of solid and the volume is measured using a gas collection system.
Stoichiometry |
Gases
Vapor Pressure: Drinking Bird  
A novelty store "Drinking Bird" repeatedly dips is beak into a beaker of water and then bobs back to an upright position. Visible movement of a liquid in the bird's body accompanies the bobbing; the movement is caused by changing vapor pressure of the liquid due to different temperatures at the bird's head and the bird's body.
Liquids |
Phases / Phase Transitions / Diagrams
Sodium Chloride Crystal Cleavage  
A knife is placed on a large sodium chloride crystal parallel to a cleavage plane. When the knife is tapped, the crystal breaks cleanly, creating two smaller crystals.
Crystals / Crystallography |
Ionic Bonding |
Solids
Atmospheric Pollution  
The formation and effects of acid rain and other pollutants are simulated.
Atmospheric Chemistry |
Gases
Atmosphere  
Topics associated with the atmosphere include atmospheric pressure, pollution and the role of ozone.
Gases |
Atmospheric Chemistry
Hydrogen + Chlorine Cannon  
When a corked test tube containing a mixture of hydrogen and chlorine is struck by light from a burning magnesium ribbon, the resulting explosion propels the cork out of the test tube.
Gases |
Photochemistry |
Reactions
Chemical Properties of Sulfur Dioxide  
Reactions involving sulfur dioxide.
Gases |
Reactions |
Oxidation / Reduction
Big Barometer  
This is a demonstration of an eleven foot high barometer made with a concentrated solution of potassium tetraiodomercurate(II). A second movie compares the densities of mercury, potassium tetraiodomercurate(II) solution, and water.
Gases |
Physical Properties
Measuring Relative Viscosity  
The rate of flow of six different liquids through a Mohr pipet is measured.
Liquids |
Physical Properties |
Laboratory Equipment / Apparatus
Paramagnetism: Nitrogen and Oxygen  
A magnet is shown to strongly attract a pair of metal tongs. The magnet has no visible effect on liquid nitrogen, but when pale blue liquid oxygen is poured near the poles of the magnet, it shows definite attraction.
Magnetic Properties |
Atomic Properties / Structure |
Liquids
Ferrofluid  
A magnet placed just below a dish containing ferrofluid generates an array of spikes in the fluid.
Liquids |
Magnetic Properties |
Metals |
Atomic Properties / Structure
Plastic Sulfur  
Yellow powdered sulfur is heated until it becomes molten and brown. At first it flows freely, but then it becomes very viscous. Upon further heating, the viscous sulfur flows freely again and ignites. The burning liquid sulfur is poured into a beaker of water. When removed from the water, the sulfur is rubbery and flexible.
Molecular Properties / Structure |
Physical Properties |
Solids
Heat Treatment of a Metal Bobby Pin  
A bobby pin is subjected to various heat treatments.
Metallic Bonding |
Metals |
Solids |
Physical Properties
Steam and Superheated Steam  
When a gas burner heats the steam coil strongly, the steam becomes superheated and is at a high enough temperature to ignite a match and react quickly with steel wool
Gases |
Phases / Phase Transitions / Diagrams
Effusion of Gases  
Effusion of various gases are compared.
Gases |
Physical Properties |
Transport Properties
Piezoelectric Effect  
Sounds accompany the discharges of electricity. A piezoelectric crystal is connected to a light bulb. When the crystal is pressed, the light flashes.
Crystals / Crystallography |
Molecular Properties / Structure |
Solid State Chemistry |
Solids
Hardness of Solid Substances  
The hardness of various solids are compared.
Covalent Bonding |
Nonmetals |
Physical Properties |
Solids |
Noncovalent Interactions
Hardness of Solid Substances - Grinding  
A number of metals and nonmetals are ground with a mortar and pestle. The nonmetals shown here are all soft (due to weak intermolecular forces), but the metals vary in hardness.
Covalent Bonding |
Nonmetals |
Physical Properties |
Solids |
Metallic Bonding |
Metals
Atmospheric Pressure  
Atmospheric pressure is used to collapse large and small metal containers.
Phases / Phase Transitions / Diagrams |
Gases |
Atmospheric Chemistry
Vapor Pressure  
Pressure exerted by vapor of several organic substances is demonstrated using barometers. Molecular models of the substances are shown.
Gases |
Phases / Phase Transitions / Diagrams |
Physical Properties
Thermochromism: Mercury(II) Iodide  
When red-orange Mercury(II) Iodide (HgI2) is heated, it undergoes a phase transition at 126oC to a pale yellow form. As the heated sample cools, it gradually returns to the original red-orange color.
Crystals / Crystallography |
Phases / Phase Transitions / Diagrams |
Physical Properties |
Solid State Chemistry |
Solids |
Descriptive Chemistry
Acid Base Reactions of Sulfur Dioxide  
Acid base reactions involving sulfur dioxide are shown.
Acids / Bases |
Gases |
Reactions |
Oxidation / Reduction |
Precipitation / Solubility |
Descriptive Chemistry |
Applications of Chemistry