| Videos: 58 results |
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
|
Electrical Conductivity-Solutions
Solutions are measured for conductivity.
Conductivity |
Solutions / Solvents |
Physical 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
|
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
|
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
|
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
|
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
|
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
|
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
|
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
|
Reactions in Aqueous Solutions
Various reactions in aqueous solutions are shown.
Aqueous Solution Chemistry |
Reactions |
Precipitation / Solubility
|
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
|
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
|
Ammonia Fountains
An ammonia fountain is demonstrated.
Acids / Bases |
Aqueous Solution Chemistry |
pH |
Precipitation / Solubility
|
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
|
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
|
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
|
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
|
Solids-Liquids
Reactions and demonstrations exploring the properties of solids and liquids.
Solids |
Liquids
|
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
|
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
|
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
|
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
|
