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Videos: 61 results
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
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
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
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
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
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
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
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
Reactions Under a Microscope  
Microscale redox and precipitation reactions.
Oxidation / Reduction |
Reactions |
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
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
Relative Reactivity: Strong Acid, Weak Acid, Buffer Solution  
A strong acid, a weak acid, and a buffer solution are each added to sodium bicarbonate and the reaction rates are compared.
Acids / Bases |
Kinetics |
pH
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
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
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
A Complete Acid-Base Titration  
A solid acid is dissolved in deionized water and titrated with sodium hydroxide solution using the color change of an indictor to determine the endpoint.
Quantitative Analysis |
Titration / Volumetric Analysis |
Acids / Bases
Reactions with Sodium  
Reactions involving sodium are demonstrated.
Oxidation / Reduction |
Reactions |
Acids / Bases |
Descriptive Chemistry
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
Conductimetric Titration  
Aqueous sulfuric acid and barium hydroxide both conduct electricity; distilled water does not. As barium hydroxide solution is added to sulfuric acid, conductivity decreases until it reaches zero at the equivalence point. As excess barium hydroxide is added, the conductivity gradually increases.
Acids / Bases |
Conductivity |
Titration / Volumetric Analysis
Quantitative Acid-Base Titration  
An acid-base titration is demonstrated along with variations in technique for handling stopcocks.
Quantitative Analysis |
Titration / Volumetric Analysis |
Acids / Bases
Reactions: Alkali Metals with Water  
Alkali Metals are shown reacting in water.
Descriptive Chemistry |
Oxidation / Reduction |
Reactions |
Water / Water Chemistry |
Acids / Bases
Acid-Base Titrations and Animation  
Videos in this group show titrations of various acids with sodium hydroxide as well as molecular reactions during titration.
Acids / Bases |
Aqueous Solution Chemistry |
Titration / Volumetric Analysis
Conductivity of Aqueous Acids, Bases, and Salts  
The conductivity of carboxylic acid solutions is tested with a conductivity apparatus.
Acids / Bases |
Carboxylic Acids |
Physical Properties |
Water / Water Chemistry
pH of Acetic Acid Derivatives  
The pH of acetic acid, monochloro-, dichloro-, trichloro-, and trifluoroacetic acids are compared.
Acids / Bases |
Carboxylic Acids |
pH |
Physical Properties |
Molecular Properties / Structure
Electrolysis  
Various examples of electrolysis are presented.
Aqueous Solution Chemistry |
Electrochemistry |
Oxidation / Reduction |
Water / Water Chemistry |
Acids / Bases |
pH |
Conductivity
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
Liquefaction of Carbon Dioxide  
Dry ice is placed into an acrylic plastic cylinder. A valve is closed and pressure in the cylinder increases. When the pressure reaches 350 kPa (50 psi) it stops increasing and liquid CO2 appears.
Equilibrium |
Phases / Phase Transitions / Diagrams |
Physical Properties