| Videos: 115 results |
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
|
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
|
Orange Tornado: Precipitation of Mercury(II) Iodide - Version 1
When mercury(II) nitrate and potassium iodide are combined with rapid stirring, an orange tornado of mercury(II) iodide is formed.
Equilibrium |
Precipitation / Solubility |
Reactions
|
Orange Tornado: Precipitation of Mercury(II) Iodide - Version 2
When mercury(II) nitrate and potassium iodide are combined with rapid stirring, an orange tornado of mercury(II) iodide is formed.
Equilibrium |
Precipitation / Solubility |
Reactions
|
Precipitation Reactions
Two versions of the Orange Tornado, two reactions under a microscope, and updated stills of other precipitation reactions provide dramatic visual displays of solid formation.
Equilibrium |
Precipitation / Solubility |
Reactions
|
Reactions Under a Microscope
Microscale redox and precipitation reactions.
Oxidation / Reduction |
Reactions |
Precipitation / Solubility
|
Reactions of Sulfurous Acid
These demonstrations illustrate the production and effects of sulfur dioxide, a pollutant generated by the burning of sulfur impurities in coal. The sulfurous acid produced by dissolving sulfur dioxide in water is allowed to react with various forms of calcium carbonate found in nature, namely marble, limestone, chalk, and eggshell.
Acids / Bases |
Precipitation / Solubility |
Reactions
|
Reactions of Nitric Acid
These demonstrations illustrate the production of nitric acid and its reaction with various forms of calcium carbonate found in nature, namely marble, limestone, chalk, and eggshell.
Acids / Bases |
Precipitation / Solubility |
Reactions
|
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
|
Reactions in Aqueous Solutions
Various reactions in aqueous solutions are shown.
Aqueous Solution Chemistry |
Reactions |
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
|
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
|
Extraction of Acid with Base
Water and diethyl ether are shaken in a separatory funnel with a small amount of red indophenol. The non-ionic indophenol remains in the ether layer, coloring it red. Addition of sodium hydroxide converts the indophenol to its blue ionic acid anion which is extracted into the water layer turning it blue.
Acids / Bases |
Precipitation / Solubility
|
Aqueous Reactions: Silver Nitrate
Reactions with the addition of ions in solution to aqueous silver nitrate.
Aqueous Solution Chemistry |
Precipitation / Solubility
|
Aqueous Reactions: Cadmium Nitrate
Reactions between various solutions and aqueous Cadmium Nitrate.
Aqueous Solution Chemistry |
Precipitation / Solubility
|
Aqueous Reactions: Cobalt(II) Chloride
Reactions of solutions with aqueous Cobalt(II) Chloride.
Aqueous Solution Chemistry |
Precipitation / Solubility
|
Aqueous Reactions: Chromium(III) Chloride
Reactions of solutions in aqueous Chromium (III) Chloride.
Aqueous Solution Chemistry |
Precipitation / Solubility
|
Aqueous Reactions: Copper(II) Nitrate
Reactions of solutions with aqueous Copper (II) Nitrate.
Aqueous Solution Chemistry |
Precipitation / Solubility
|
Aqueous Reactions: Copper(II) Sulfate
Reactions of solutions with aqueous Copper (II) Sulfate.
Aqueous Solution Chemistry |
Precipitation / Solubility
|
Aqueous Reactions: Iron(II) Ion
Reactions of solutions with aqueous Iron(II) Ion.
Aqueous Solution Chemistry |
Precipitation / Solubility
|
Aqueous Reactions: Iron(III) Ion
Reactions of solutions with aqueous Iron (III) Ions.
Aqueous Solution Chemistry |
Precipitation / Solubility
|
Aqueous Reactions: Sulfuric Acid
Reactions of solutions with aqueous Sulfuric Acid.
Aqueous Solution Chemistry |
Precipitation / Solubility
|
Aqueous Reactions: Hydrochloric Acid
Reactions of solutions with aqueous Hydrochloric Acid.
Aqueous Solution Chemistry |
Precipitation / Solubility
|
Aqueous Reactions: Mercury(II) Ion
Reactions of solutions with aqueous Mercury (II) Ions.
Aqueous Solution Chemistry |
Precipitation / Solubility
|
Aqueous Reactions: Mercury(I) Nitrate
Reactions of solutions with aqueous Mercury (I) Nitrate.
Aqueous Solution Chemistry |
Precipitation / Solubility
|
Aqueous Reactions: Manganese (II) Chloride
Reactions of solutions with Manganese (II) Chloride.
Aqueous Solution Chemistry |
Precipitation / Solubility
|
Aqueous Reactions: Sodium Chloride
Reactions of solutions with aqueous Sodium Chloride.
Aqueous Solution Chemistry |
Precipitation / Solubility
|
Aqueous Reactions: Sodium Carbonate
Reactions of solutions with aqueous Sodium Carbonate.
Aqueous Solution Chemistry |
Precipitation / Solubility
|
Aqueous Reactions: Sodium Hydroxide
Reactions of solutions with aqueous Sodium Hydroxide.
Aqueous Solution Chemistry |
Precipitation / Solubility
|
Aqueous Reactions: Nickel(II) Nitrate f
Reactions of solutions with aqueous Nickel (II) Nitrate.
Aqueous Solution Chemistry |
Precipitation / Solubility
|
Aqueous Reactions: Lead(II) Nitrate
Reactions of solutions with aqueous Lead (II) Nitrate.
Aqueous Solution Chemistry |
Precipitation / Solubility
|
Aqueous Reactions: Strontium Chloride
Reactions of solutions with aqueous Strontium Chloride.
Aqueous Solution Chemistry |
Precipitation / Solubility
|
Aqueous Reactions: Zinc Nitrate
Reactions of solutions with Zinc Nitrate.
Aqueous Solution Chemistry |
Precipitation / Solubility
|
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
|
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
|
Like Dissolves Like - Demonstration
Some substances dissolve readily in others. Some substances do not. Some substances are more dense than others.
Noncovalent Interactions |
Physical Properties |
Precipitation / Solubility
|
Like Dissolves Like - Multimedia Experiments
There are a total of six experiments you can view. You can view them in any order, as many times as you wish. Each experiment has three steps.
Noncovalent Interactions |
Physical Properties |
Precipitation / Solubility
|
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
|
Ammonia Fountains
An ammonia fountain is demonstrated.
Acids / Bases |
Aqueous Solution Chemistry |
pH |
Precipitation / Solubility
|
Ammonia Fountains - Multiple
System of multiple ammonia fountains are set up and run. A separatory funnel, four round-bottomed flasks, and some tubing form a closed system. One end of the tubing is immersed in an acetic acid solution that contains universal indicator. The glassware has been filled with ammonia gas. The stopcock of the funnel is closed.
Acids / Bases |
Aqueous Solution Chemistry |
pH |
Precipitation / Solubility
|
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
|
Combustion Reactions
Combustion reactions of methane, hydrogen, hexane, and natural gas in chlorine are demonstrated.
Reactions
|
Organic Compounds
An assortment of organic compounds are ignited under various conditions.
Reactions
|
Reactions: Chlorine
Reactions and explosions involving chlorine are demonstrated.
Reactions
|
Iodine
Reactions and explosions involving iodine and its compounds are demonstrated.
Reactions
|
Nitrogen
A reaction with nitrogen is demonstrated.
Reactions
|
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
|
Heat Treatment of a Metal Bobby Pin
A bobby pin is subjected to various heat treatments.
Metallic Bonding |
Metals |
Solids |
Physical Properties
|
Memory Metal
When a piece of metal wire spelling the letters ICE is pulled apart, it deforms. When the wire is placed in hot water, it "remembers" its original shape, once again forming the letters ICE. (The memory metal used in this demonstration was provided by the Institute for Chemical Eduction.) A simulation of the processes at the atomic level is shown.
Metals |
Physical Properties |
Solid State Chemistry
|
Combination Reactions
Videos of various combination reactions.
Reactions |
Addition Reactions
|
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
|
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
|
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: 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
|
Metallocene Catalyzed Polymerization of Ethylene
Polymerization chemistry is demonstrated by the reaction between ethylene and a Ziegler-Natta catalyst.
Polymerization |
Catalysis |
Reactions
|
Combustion of Methane
Methane combustion in balloons, a Bunsen burner flame, and methane combustion in chlorine are demonstrated.
Alkanes / Cycloalkanes |
Reactions
|
Combustion of Hexane
Combustion of hexane with limited oxygen and addition of water to burning hexane are demonstrated.
Alkanes / Cycloalkanes |
Reactions
|
Bromination of Hydrocarbons
The light initiated bromination of pentane, hexane isomers, alkyl benzenes and a comparison of bromination of pentane and pentene are demonstrated.
Alkanes / Cycloalkanes |
Reactions
|
Diels-Alder Visualization
Several computer animations of a Diels-Alder reaction that were created as an undergraduate student project are presented.
Addition Reactions |
Alkenes
|
Addition Reactions of Alkenes
The Diels-Alder reaction, addition of oxygen to tetrakis(N, N-dimethylamino) ethylene, polymerization of ethylene, and addition of iodine to a-pinene are demonstrated. Molecular models of ethene are shown.
Addition Reactions |
Alkenes
|
Aldol Condensation Reactions
Aldol condensation reactions are demonstrated.
Aldehydes / Ketones |
Reactions
|
Sucrose Dehydration gives Sulfur Dioxide
Sulfuric acid dehydrates sucrose forming carbon.
Carbohydrates |
Oxidation / Reduction |
Reactions
|
Rapid Combustion of Peroxyacetone (Version 1)
In this demonstration, the peroxyacetone is piled loosely onto an iron surface and ignited with an electric arc, resulting in a ball of flame and a muffled report.
Oxidation / Reduction |
Reactions
|
Explosive Combustion of Peroxyacetone (Version 2)
In this demonstration, the peroxyacetone is tightly wrapped with an inserted thumbtack and ignited with an electric arc, resulting in an explosive detonation.
Oxidation / Reduction |
Reactions
|
Combustion of Peroxyacetone
The combustion of peroxyacetone is demonstrated in two ways.
Oxidation / Reduction |
Reactions
|
Nonmetals
Nonmetals are ignited under various conditions.
Reactions |
Descriptive Chemistry |
Nonmetals
|
Aluminum: Reactions
Reactions involving aluminum are demonstrated.
Reactions |
Descriptive Chemistry
|
Reactions with Zinc
Reactions involving zinc are demonstrated.
Reactions |
Descriptive 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
|
Hydrogen
Reactions and explosions involving hydrogen and its compounds are demonstrated.
Reactions |
Descriptive Chemistry
|
Oxygen
Reactions and explosions involving oxygen and its compounds are demonstrated.
Reactions |
Descriptive Chemistry
|
Sulfur
Reactions and explosions involving sulfur are demonstrated.
Reactions |
Descriptive Chemistry
|
Reaction: Potassium with Bromine
A small piece of potassium is carefully added to liquid bromine, producing a violent reaction.
Oxidation / Reduction |
Reactions
|
Alkaline Earths Reactions
Reactions of the alkaline earth metals in air, water, acid, and other compounds.
Descriptive Chemistry |
Reactions
|
Chemical Properties of Sulfur Dioxide
Reactions involving sulfur dioxide.
Gases |
Reactions |
Oxidation / Reduction
|
Reactions: Nonmetals with Air
Various nonmetallic elements reacting with air are shown.
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
|
Reactions: Alkali Metals with Other Elements
Alkali Metals are shown reacting with various elements.
Oxidation / Reduction |
Reactions |
Descriptive Chemistry
|
Reactions: Alkaline Earth Metals with Air
Alkali earth metals are shown reacting in air.
Descriptive Chemistry |
Oxidation / Reduction |
Reactions
|
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
|
Metals
Samples of metals are ignited or heated over a flame, resulting in oxide formation.
Descriptive Chemistry |
Oxidation / Reduction |
Reactions
|
Dust Explosion
Here are two demonstrations of the principle behind a grain elevator explosion. Lycopodium powder is dispersed inside closed containers containing a lighted candle resulting in explosions.
Agricultural Chemistry |
Applications of Chemistry |
Reactions
|
Combustion of White Phosphorus
Phosphorus combines with oxygen in a highly exothermic reaction.
Descriptive Chemistry |
Oxidation / Reduction |
Reactions
|
Reactions with Potassium
Reactions involving potassium are demonstrated.
Oxidation / Reduction |
Reactions |
Descriptive Chemistry
|
Reactions with Transition Metals
A number of reactions with transition metals are demonstrated.
Reactions |
Descriptive Chemistry |
Transition Elements
|
Bromine
Reactions and explosions involving bromine are demonstrated.
Calorimetry / Thermochemistry |
Oxidation / Reduction |
Reactions
|
Reactions of Iodine with alpha-Pinene
Reactions of Iodine with alpha-Pinene
Addition Reactions |
Alkenes |
Applications of Chemistry
|
Halogens
Other flames and explosions involving halogens are demonstrated.
Reactions |
Descriptive Chemistry |
Applications of Chemistry
|
Nitrogen Triiodide Detonation
Simply touching dry nitrogen triiodide with a feather causes it to explode.
Calorimetry / Thermochemistry |
Oxidation / Reduction |
Reactions
|
Flames and Explosions, Other Than Combustion Reactions
Flames and explosions, other than combustion reactions, are demonstrated.
Descriptive Chemistry |
Reactions |
Applications of Chemistry
|
Transition Element Reactions
Reactions of transition elements in water, air, acids, and bases.
Descriptive Chemistry |
Reactions |
Transition Elements
|
Oxidation-Reduction Reactions
Reactions or demonstrations exploring oxidation/reduction chemistry.
Reactions |
Oxidation / Reduction |
Descriptive Chemistry
|
Reaction: Sodium with Acids
Reaction of sodium with acid.
Acids / Bases |
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
|
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 Acids
Alkali earth metals are shown reacting with acids.
Acids / Bases |
Descriptive Chemistry |
Oxidation / Reduction |
Reactions
|
Acid Base Reactions
Simple experiments show the titration of acids with sodium hydroxide and the generation of acid from carbon dioxide in water.
Acids / Bases |
Aqueous Solution Chemistry |
Reactions |
pH
|
Reactions: Acetylene
Preparation of acetylene and the reaction of chlorine with acetylene are demonstrated. An antique carbide lamp is also demonstrated.
Alkynes |
Reactions |
Water / Water Chemistry |
Oxidation / Reduction
|
Polymers
Formation of formaldehyde copolymers, nylon rope, high and low density polyethylene, combustion of polyethylene and polystyrene, Beilstein test, formation of solid latex, cleaning oil spills, slime, solid foams, super absorbent polymer, formation of polyurethane foam under normal and micro gravity, and construction of a rod climbing apparatus are demonstrated.
Polymerization |
Reactions |
Applications of Chemistry |
Consumer Chemistry
|
Reactions involving Acetylene
Some movies relating to acetylene are presented.
Alkynes |
Reactions |
Water / Water Chemistry |
Applications of Chemistry
|
Energy from Oxidation of Food
Food undergoes rapid oxidation when placed in molten potassium chlorate.
Calorimetry / Thermochemistry |
Kinetics |
Oxidation / Reduction |
Reactions |
Nutrition
|
Reactions with Sodium
Reactions involving sodium are demonstrated.
Oxidation / Reduction |
Reactions |
Acids / Bases |
Descriptive Chemistry
|
TNT Detonation
TNT is stable in the presence of shock, but can be detonated by adding a chemical priming agent.
Oxidation / Reduction |
Thermodynamics |
Aromatic Compounds |
Reactions
|
Decomposition Reactions
Various examples of decomposition reactions are presented.
Oxidation / Reduction |
Reactions |
Aqueous Solution Chemistry
|
Oxidation of Glycerin by Potassium Permanganate
Oxidation of glycerin (1,2,3-propanetriol) by potassium permanganate is demonstrated.
Alcohols |
Calorimetry / Thermochemistry |
Oxidation / Reduction |
Reactions
|
Formation of Carbon from Carbohydrate
Sulfuric acid has a very high affinity for water. It is shown to dehydrate a carbohydrate (sucrose) forming carbon. Sulfuric acid is reduced to sulfur dioxide, which bleaches a rose petal.
In a second experiment, the sulfur dioxide reduces purple permanganate to nearly colorless manganese(II).
Acids / Bases |
Carbohydrates |
Oxidation / Reduction |
Reactions
|
Ring Strain
Mixing solid iodine and cyclohexene shows little reaction but mixing iodine and alpha-pinene produces a very vigorous exothermic reaction and sublimation of solid iodine to dense iodine vapor.
Addition Reactions |
Molecular Properties / Structure |
Applications of Chemistry
|
Reactions: Nonmetals with Water
Nonmetallic elements are shown reacting with water.
Descriptive Chemistry |
Oxidation / Reduction |
Reactions |
Water / Water Chemistry
|
Reactions: Alkaline Earth Metals with Water
Alkali earth metals are shown reacting in water.
Descriptive Chemistry |
Oxidation / Reduction |
Reactions |
Water / Water Chemistry
|
Reactions: Alkali Metals with Water
Alkali Metals are shown reacting in water.
Descriptive Chemistry |
Oxidation / Reduction |
Reactions |
Water / Water Chemistry |
Acids / Bases
|
Pulsating Electrochemical Reaction: Mercury Beating Heart
A drop of mercury in a watch glass is covered with a solution of potassium chromate in concentrated sulfuric acid. An iron nail is positioned so that it nearly touches the mercury. Eventually, the mercury drop starts to beat rhythmically, like a beating heart.
Electrolytic / Galvanic Cells / Potentials |
Oxidation / Reduction |
Reactions |
Surface Science
|
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
|
