Measuring Volume Using a Graduated Cylinder
By Jill Crowder
Learners view an explanation of how to read a graduated cylinder by measuring the lowest portion of the meniscus. A quiz completes the activity.
The Formation of Ester Bonds in the Synthesis of Lipids
By Richard Wilkosz
In this animated object, learners examine the formation of ester bonds in the synthesis of lipids using triglyceride biosynthesis as an example. Ester bond formation is described as a dehydration synthesis reaction.
Reading a Triple Beam Balance
Students identify the parts of a triple beam balance and practice measuring the mass of objects.
Naming Binary Ionic Compounds Containing Fixed Oxidation State Cations
By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton
Learners examine a table containing the names of common cations and anions.
Energy in Chemical Reactions
By Dr. Miriam Douglass
In this animated and interactive object, learners examine kinetic and potential energy as well as the first law of thermodynamics and the flow of energy between a system and its surroundings. Students also answer questions about exothermic and endothermic reactions
Atomic Structure and Ionic Bonding
By Jill Larson
In this animated object, learners examine the chemistry behind table salt.
The Mole and Avogadro's Number
Learners examine how chemists use moles to "count" atoms by weight. Examples are given.
Biomolecules: The Carbohydrates (Video)
By Becky Polk-Pohlman
Viewers watch an introduction to monosaccharides, disaccharides, and polysaccharides. The processes for dehydration synthesis and hydrolysis.
Types of Elements in the Periodic Table and Their Properties (Screencast)
By Debbie McClinton, Dr. Martin McClinton
In this screencast, we review the positions of metals, metalloids, and nonmetals in the Periodic Table and the general characteristics of each.
Peptide Bond Formation
In this animated object, learners examine the formation of peptide bonds through dehydration synthesis.
Science Lab Equipment - Pt 1 (Screencast)
By Bruce Bell
In this screencast we are introduced to the lab equipment used to contain and dispense chemicals.
Phase Transitions
Learners examine how melting, vaporization, and sublimation require energy input while freezing and condensation release energy.
Precipitation Reactions
By Dr. Miriam Douglass, Dr. Martin McClinton
In this interactive and animated object, learners use solubility rules to predict when an insoluble ionic compound will precipitate in a double replacement reaction. Step-by-step examples are given.
Covalent Bonds
In this animated object, students examine what happens when electrons share molecules.
Acids & Bases
Students read different definitions of "acids" and "bases." In an interactive exercise, they identify if a substance is an acid or a base.
Vapor Pressure
Vapor pressure is the pressure exerted by molecules in the gas phase in equilibrium with a liquid or a solid. Two examples are used to illustrate vapor pressure: the drying of clothes and the evaporation of ice.
Changes in Our World: Chemical and Physical (Screencast)
By Deb Simonson
In this screencast, learners examine the kinds of physical and chemical changes that occur in substances.
Double Replacement Reactions
In this interactive object, learners identify charges on ions, write new formulas based on charge, and balance equations using coefficients.
Gas Volume vs. Temperature (Charles's Law)
In this animated object, learners examine how gas volume varies directly with absolute temperature (K at constant pressure). An example of a sample of gas at two conditions of volume and temperature is used to illustrate the law.
Oxidation-Reduction Reactions
Learners examine the meaning of oxidation, reduction, and half-reaction, and watch a film showing the deposition of copper metal from the reduction of copper (II) ion by aluminum. A brief quiz completes the activity.
Moles
In this animated object, students are introduced to moles as a measurement.
The Effect of Temperature on the Vapor Pressure of a Liquid
Learners examine how vapor pressure is calculated. The vapor pressure of a liquid increases with increasing temperature. If the heat of vaporization and the vapor pressure at one temperature are known, the vapor pressure at a second temperature can be calculated.
The Three States of Matter
In this animated and interactive object, learners examine the properties of liquids, solids, and gases.
Introduction to Safety in the Chemistry Lab (Video)
Learners read about lab equipment and basic safety measures. In a quiz, they view photos and determine if the lab technicians pictured are using safe practices.
Measuring Gas Pressure
Learners convert units used to designate pressure. Units for pressure are atm, mm Hg, torr, and pascal.