| Videos: 74 results |
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
|
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
|
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
|
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
|
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
|
Precipitation Reactions
Approximately 2 mL of Solution A is added to a sample of Solution B with a dropping pipet. If a precipitate forms, the resulting precipitate is supended in the mixture. The mixture is then stirred with a glass stirring rod and the precipitate is allowed to settle for about a minute.
Aqueous Solution Chemistry |
Precipitation / Solubility |
Reactions
|
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
|
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 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
|
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
|
Electrolysis
Various examples of electrolysis are presented.
Aqueous Solution Chemistry |
Electrochemistry |
Oxidation / Reduction |
Water / Water Chemistry |
Acids / Bases |
pH |
Conductivity
|
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
|
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
|
Aqueous Reactions: Barium Chloride
Reactions of solutions with aqueous Barium Chloride.
Aqueous Solution Chemistry
|
Aqueous Reactions: Ammonia
Reactions of solutions with aqueous Ammonia.
Aqueous Solution Chemistry
|
Electrolysis of Aqueous Solutions -- Original
Electrolysis of several aqueous solutions is carried out using a 9-V battery and pencil leads as electrodes. Because only the electrodes are shown in the videos, it is important to show these still images  
or describe how the reactions were performed if students are to make sense of the videos. In each case the anode is on the left and a 9-V battery has been connected to the lead of each of the pencils near the eraser end with an alligator clip. A newer version of most of these reactions using platinum electrodes is available as Electrolysis of Aqueous Solutions -- New.
Aqueous Solution Chemistry |
Electrochemistry
|
Oxidation-Reduction Aqueous Solutions
Oxidation-reduction reactions carried out in aqueous solution.
Oxidation / Reduction |
Aqueous Solution Chemistry
|
Halogen-Halide Redox Reactions
An aqueous solution of a halogen (Cl2, Br2 or I2) is poured into an aqueous halide solution (Cl-, Br- or I-) covered with a layer of hexane.
Oxidation / Reduction |
Aqueous Solution Chemistry
|
Gas Producing
Electrolysis of solutions with only gas(es) produced is shown.
Aqueous Solution Chemistry |
Electrochemistry |
Oxidation / Reduction
|
Tin Compounds
Electrolysis of tin(II) and tin(IV) solutions of different concentrations is shown.
Aqueous Solution Chemistry |
Electrochemistry |
Oxidation / Reduction
|
Solid Producing
Electrolysis of solutions in which a solid is produced is shown.
Aqueous Solution Chemistry |
Electrochemistry |
Oxidation / Reduction
|
Electrolysis of Aqueous Solutions -- New
This is a revised version of the previously published Electrolysis of Aqueous Solutions, providing corrections and additional images. In order to understand most of these videos it is important to either see the Complete Experiment: Electrolysis of an Aqueous Solution video or to be able to read a description of that video (such as the one in the Discussion section for that video).
Aqueous Solution Chemistry |
Electrochemistry |
Oxidation / Reduction
|
Closeup Videos of Flames from Aqueous Solutions
Aqueous solutions of common compounds are introduced via aerosol to flame, producing their characteristic emission colors.
Descriptive Chemistry |
Spectroscopy |
Aqueous Solution Chemistry
|
Decomposition Reactions
Various examples of decomposition reactions are presented.
Oxidation / Reduction |
Reactions |
Aqueous Solution Chemistry
|
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
|
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
|
Redox Titration and Animation
Videos in this group show a redox titration and the molecular changes during the titration.
Aqueous Solution Chemistry |
Oxidation / Reduction |
Titration / Volumetric Analysis
|
HCl, NaOH, NaCl and Water
Electrolysis of HCl, NaOH and NaCl solutions and of water is shown.
Aqueous Solution Chemistry |
Electrochemistry |
Oxidation / Reduction |
Water / Water Chemistry
|
Electrochemical Series: Metal Trees
A piece of metal (Cu, Zn, Ag, Cd, or Pb) is placed in an aqueous solution of a metal ion (Cu2+, Zn2+, Ag+, Cd2+, or Pb2+). In some cases the growth of metal crystals indicates that a chemical reaction has occurred.
Aqueous Solution Chemistry |
Oxidation / Reduction |
Electrolytic / Galvanic Cells / Potentials |
Electrochemistry
|
Reactions Under a Microscope
Microscale redox and precipitation reactions.
Oxidation / Reduction |
Reactions |
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
|
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
|
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
|
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
|
