| Videos: 13 results |
Vapor Pressure: Molecular Size
The vapor pressures of pentane, hexane, and heptane are compared. The vapor pressures of methanol and ethanol are compared. Molecular models of the compounds are shown.
Alkanes / Cycloalkanes |
Noncovalent Interactions |
Physical Properties |
Alcohols
|
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
|
Structures and Conformations
Molecular models are used to demonstrate the conformations of alkanes and cycloalkanes.
Alkanes / Cycloalkanes |
Molecular Properties / Structure |
Nomenclature / Units / Symbols |
Stereochemistry
|
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
|
Chiral and Achiral Objects
A snail shell, pencil, glove, hand, and molecular models are shown with their mirror reflections.
Chirality / Optical Activity
|
Glyceraldehyde and the Fischer Projection
Molecular models are used to demonstrate chirality of glyceraldehyde and drawing its Fischer Projection.
Chirality / Optical Activity |
Stereochemistry |
Molecular Properties / Structure
|
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
|
Relation of Structure to Boiling Point of Alkanes
The boiling point of straight-chain alkanes and isomers of hexane are determined and molecular models of the hydrocarbons are shown.
Alkanes / Cycloalkanes |
Molecular Properties / Structure |
Physical Properties |
Constitutional Isomers
|
Vapor Pressure
Pressure exerted by vapor of several organic substances is demonstrated using barometers. Molecular models of the substances are shown.
Gases |
Phases / Phase Transitions / Diagrams |
Physical Properties
|
Example of Extraction of an Acid-Base Indicator
An acid–base indicator is shown to concentrate in the aqueous phase when ionized and in the nonpolar phase when molecular.
Laboratory Equipment / Apparatus
|
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
|
Aromatic Compounds
A molecular model of benzene, the reactions of bromine with cylohexane, cyclohexene, benzene, phenol, and toluene, the effect of substituents and number of methyl groups on the electron density of aromatic rings, and chlorination reactions of methyl benzenes are demonstrated.
Aromatic Compounds
|
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
|
