| Videos: 13 results |
Magic Sand
The grains of Magic Sand have been specially treated in a way that greatly reduces the attraction of water molecules to their surfaces.
Noncovalent Interactions
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Denaturing Proteins
Egg white proteins are denatured by acid, lead solution, and heat.
Noncovalent Interactions |
Proteins / Peptides
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Floating Squares
Graphite (from a pencil lead) is applied to one side of an index card and a piece of the card is immersed in a beaker containing hexane and water (two layers). The graphite-coated side always faces the hexane layer. When the two liquids are carbon tetrachloride and water the graphite-coated side always faces the carbon tetrachloride.
Noncovalent Interactions |
Physical Properties
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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
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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
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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
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Electrostatic Attraction-Liquids
Liquids are brought near a charged rod to check for attraction.
Covalent Bonding |
Noncovalent Interactions |
Water / Water Chemistry
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Viscosity of Liquids
Various experiments determining the viscosity of liquids.
Hydrogen Bonding |
Liquids |
Noncovalent Interactions |
Physical Properties |
Transport Properties
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Hardness of Solid Substances
The hardness of various solids are compared.
Covalent Bonding |
Nonmetals |
Physical Properties |
Solids |
Noncovalent Interactions
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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
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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
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Hydrophobic Effect
Hydrophobic Effect: Octanoic acid forms a monolayer on the surface of water under certain conditions.
Alkanes / Cycloalkanes |
Carboxylic Acids |
Molecular Properties / Structure |
Water / Water Chemistry |
Noncovalent Interactions
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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
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