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Videos: 40 results
Exploding Soap Bubbles: Hydrogen + Oxygen  
A series of three videos shows that as the ratio of oxygen to hydrogen in soap bubbles increases, the explosions that occur when the bubbles are ignited get louder. (The fact that with an excess of oxygen the explosions would become softer again is not shown.) Each video is repeated with no voice-over so that only the sounds of the explosions are heard. Five still images are provided to show the stoichiometry on the molecular scale. The videos are intended to be shown in order beginning with Hydrogen Alone and ending with hydrogen plus more oxygen.
Reactions |
Oxidation / Reduction
Reaction, Microscale: Tin with Gold(III) Chloride  
A piece of metallic tin is carefully combined with a solution of gold(III) chloride under a microscope.
Oxidation / Reduction |
Reactions
Oxidation-Reduction (Redox) Reactions  
Demonstrations exploring oxidation/reduction chemistry.
Aqueous Solution Chemistry |
Electrochemistry |
Oxidation / Reduction |
Water / Water Chemistry |
Acids / Bases |
pH |
Conductivity |
Reactions |
Applications of Chemistry |
Descriptive Chemistry |
Electrolytic / Galvanic Cells / Potentials |
Laboratory Equipment / Apparatus
Reactions Under a Microscope  
Microscale redox and precipitation reactions.
Oxidation / Reduction |
Reactions |
Precipitation / Solubility
Discovery Videos  Lyubov Hoffman Laroche, Gary Wulfsberg, Barbara Young
The use of digital video for instruction has many advantages. In many situations the only way to present some chemical phenomena is through the use of video. The two video lessons presented here are examples intended to supplement our article in the August 2003 issue of JCE.
Descriptive Chemistry |
Periodicity / Periodic Table
Denaturation of Protein by Strong Acid  John W. Moore, Jerrold J. Jacobsen, Gary Trammell, Kristin Johnson
"Strong acid denatures egg white proteins.This video contains voiceover:""The tertiary structure of egg white proteins is held together by hydrogen bonding and hydrophobic interactions. Adding strong acid to the protein disrupts the intermolecular forces, and the tertiary structure is lost. The loss in protein structure is called denaturation. The proteins precipitate, forming a white solid."""
Acids / Bases |
Proteins / Peptides
Which Is Hot  John W. Moore, Jerrold J. Jacobsen, Lois M. Browne, John F. Zimmerman
"Two identical test tubes are shown; one is hot, and one is not. This video contains voiceover: Hot glass looks just like cold glass but it can cause severe burns. Be Careful!"
Centrifuging a Sample  John W. Moore, Jerrold J. Jacobsen, Lois M. Browne, John F. Zimmerman
The demonstration on this page shows a technique that should not be used by undergraduate chemistry laboratory. This video shows what happens to sample in a centrifuge while the centrifuge is on, and the result of stopping the centrifuge improperly. A narrative is included in this video: The centrifuging process allows the solvent to completely settle out. The jarring caused by hand braking destroys the distinct separation between supernatant and solid.
Separation Science |
Laboratory Equipment / Apparatus
Chemistry Comes Alive!  John W. Moore, Jerrold J. Jacobsen
Chemistry truly does come to life through this collection of pictures, animations, and movies depicting chemical reactions and techniques. The Chemistry Comes Alive! collection includes hundreds of high quality QuickTime movies and thousands of still pictures.
ChemPages Laboratory Resources  John W. Moore, Jerrold J. Jacobsen, Joe L. March
The Laboratory Resources are a set of web pages that include text, images, video, and self check questions. The topics included are those that are commonly encountered in the first-year chemistry laboratory. They have been put together for use as both a pre-laboratory preparation tool and an in-laboratory reference source.
Electrochemical Cells  
Techniques involved in measuring the voltage of an electrochemical cell and some common errors in constructing electrochemical cells are demonstrated.
Electrolytic / Galvanic Cells / Potentials |
Laboratory Equipment / Apparatus
Reaction, Microscale: Mercury With Silver Nitrate  
A droplet of mercury is carefully combined with a solution of silver nitrate under a microscope.
Oxidation / Reduction |
Reactions
Reactions, Microscale: Precipitation  
Here we show two precipitation reactions under a microscope. They are potassium dichromate crystal with silver nitrate and potassium iodide with lead nitrate.
Precipitation / Solubility |
Reactions
Reactions, Microscale: Oxidation-Reduction  
Three oxidation-reduction reactions are shown under a microscope. They are silver with mercury chloride, aluminum with gold chloride, and tin with gold chloride.
Oxidation / Reduction |
Reactions
Reaction, Microscale: Potassium Dichromate with Silver Nitrate  
A crystal of potassium dichromate is carefully combined with a solution of silver nitrate under a microscope. The reaction takes some time, so it is shown in a series of seven sequential videos. To see the entire reaction you need to play all seven.
Precipitation / Solubility |
Reactions
Reaction: Sodium with Acids  
Reaction of sodium with acid.
Acids / Bases |
Descriptive Chemistry |
Oxidation / Reduction |
Reactions
Reactions: Nonmetals with Water  
Nonmetallic elements are shown reacting with water.
Descriptive Chemistry |
Oxidation / Reduction |
Reactions |
Water / Water Chemistry
Reactions: Nonmetals with Air  
Various nonmetallic elements reacting with air are shown.
Descriptive Chemistry |
Oxidation / Reduction |
Reactions
Reactions: Nonmetals with Base   
Nonmetallic elements are shown reacting with bases.
Acids / Bases |
Descriptive Chemistry |
Oxidation / Reduction |
Reactions
Reactions: Nonmetals with Acids  
Nonmetallic elements are shown reacting with acids.
Acids / Bases |
Descriptive Chemistry |
Oxidation / Reduction |
Reactions
Oxidation-Reduction Reactions  
Electrolysis reactions and the action of nitric acid on iron and copper illustrate the concepts of oxidation and reduction. Also three oxidation-reduction reactions are shown under a microscope.
Oxidation / Reduction |
Descriptive Chemistry |
Reactions
Ammonia Fountains  
An ammonia fountain is demonstrated.
Acids / Bases |
Aqueous Solution Chemistry |
pH |
Precipitation / Solubility
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
Reaction: Potassium with Water  
Demonstrations of potassium reacting in water.
Descriptive Chemistry |
Water / Water Chemistry
Oscillating Reaction: Briggs-Rauscher  
When a solution of malonic acid, starch, and manganese(II) ion is added to a solution of hydrogen peroxide, iodate ion, and sulfuric acid, gas bubbles form and the color of the resulting mixture oscillates periodically from colorless to amber to blue.
Kinetics |
Oxidation / Reduction |
Electrolytic / Galvanic Cells / Potentials
Reactions: Alkali Metals with Acids  
Alkali metals are shown reacting with acids.
Acids / Bases |
Descriptive Chemistry |
Oxidation / Reduction |
Reactions
Reactions: Alkali Metals with Base  
Alkali Metals are shown reacting with base.
Acids / Bases |
Descriptive Chemistry |
Oxidation / Reduction |
Reactions
Reactions: Alkaline Earth Metals with Water  
Alkali earth metals are shown reacting in water.
Descriptive Chemistry |
Oxidation / Reduction |
Reactions |
Water / Water Chemistry
Combustion Reactions  
A number of dramatic combustion reactions are demonstrated.
Descriptive Chemistry |
Reactions |
Applications of Chemistry
Reactions of Sulfuric Acid  
Reactions of materials reacting with sulfuric acid are shown.
Acids / Bases |
Oxidation / Reduction |
Reactions |
Descriptive Chemistry |
Aqueous Solution Chemistry |
Precipitation / Solubility
Reactions: Alkali Metals with Other Elements  
Alkali Metals are shown reacting with various elements.
Oxidation / Reduction |
Reactions |
Descriptive Chemistry
Reactions: Alkaline Earth Metals with Acids  
Alkali earth metals are shown reacting with acids.
Acids / Bases |
Descriptive Chemistry |
Oxidation / Reduction |
Reactions
Reactions: Alkaline Earth Metals with Air  
Alkali earth metals are shown reacting in air.
Descriptive Chemistry |
Oxidation / Reduction |
Reactions
Electrolysis  
Various examples of electrolysis are presented.
Aqueous Solution Chemistry |
Electrochemistry |
Oxidation / Reduction |
Water / Water Chemistry |
Acids / Bases |
pH |
Conductivity
Reactions: Alkali Metals with Water  
Alkali Metals are shown reacting in water.
Descriptive Chemistry |
Oxidation / Reduction |
Reactions |
Water / Water Chemistry |
Acids / Bases
Reactions: Alkali Metals with Air  
Alkali Metals are shown reacting in air.
Descriptive Chemistry |
Oxidation / Reduction
Reactions: Magnesium and Magnesium Compounds  
Videos in this group show chemical reactions of magnesium and of magnesium ions in solution.
Applications of Chemistry |
Oxidation / Reduction |
Reactions
Standing Waves on a Wave Demonstrator (with frequency)  
The relationship between frequency and wavelength for standing waves on a 0.90 m short-rod wave demonstrator is explored. The frequency is displayed at the bottom of the screen.
Quantum Chemistry
Hydrogen Balloon Explosions  
Balloons containing various substances and hydrogen are exploded, revealing characteristic flame colors. In all cases except one, the substance had been mixed with methanol and water.
Descriptive Chemistry |
Spectroscopy
Cadmium Nitrate with Sodium Sulfide  
Here, sodium sulfide (Na2S) is added to cadmium nitrate (Cd(NO3)2). The result is a deep yellow-orange precipitate.
Aqueous Solution Chemistry |
Precipitation / Solubility |
Reactions