Calculating Gas Density from Standard Molar Volume
By Dr. Miriam Douglass
Learners calculate gas density from the standard molar volume and observe how the density increases with the increasing molecular weight of the gas.
Dilution of Hydrochloric Acid
By Jill Larson
In this interactive object, learners examine how to properly dilute hydrochloric acid.
Identifying Compounds and Ions
Learners complete an exercise to match chemical formulas with the names of binary compounds, tertiary compounds, and ions.
Gas Volume and Molar Amount
In this brief object, learners examine the direct relationship between the volume of a gas sample and the number of moles of gas. A problem is presented so students can test their knowledge of Avogadro's Law.
Equilibrium
By Jill Larson, Anne Peregrine
Equilibrium plays a vital role in our lives. We'll show you how the equilibrium formula works in real life using our friend the chicken.
The Combined Gas Law
By Dr. Miriam Douglass, Dr. Martin McClinton
Learners combine Boyle's Law and Charles's Law to solve for the pressure, volume, and temperature of a gas sample under two sets of conditions.
Ideal Gas Law
In this interactive object, learners use the ideal gas law to solve a practice problem.
Solubility of Ionic Compounds in Water
Learners view movie clips to determine the solubility of two ionic compounds. They also examine a solubility chart and predict the solubility of compounds.
Product Yields in Chemical Reactions (Screencast)
By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton
Learners examine the meaning of theoretical yield, actual yield, and percent yield. They test their knowledge by solving two problems.
Molarity
Students solve a molarity problem in a drag and drop exercise.
Controlling pH
By Terry Bartelt
Learners view an animated presentation showing how the pH level of a cleaning solution is controlled in a closed-loop system in a manufacturing setting. A quiz completes the activity.
The Kinetic Theory of Gases
In this animated activity, learners examine what gases are composed of and how their particles interact. They also consider several assumptions that form the basis for the Kinetic Theory of Gases.
Taffy Atoms
By Eileen Bouchard
Students read brief descriptions of atoms, molecules, elements, and compounds, and complete a matching exercise that pictures these particles and molecules as pieces of taffy.
pH and Its Basic Principles
By Joan Kornitz
In this animated object, learners view hydrogen and hydroxide ions in a solution. A brief quiz on the basic principles of the term pH completes the activity.
Common Types of Oxidation-Reduction Reactions (Screencast)
Learners identify combination, decomposition, displacement, and combustion types of redox reactions. They also watch a video clip that demonstrates the reaction of sodium and water.
Percent Composition of Compounds (Screencast)
Learners examine the method used to calculate the mass percent of an element in a compound. Three examples and one problem illustrate the method.
Chemistry Math - Solving a Formula (Screencast)
By Laurel Maney
Students use algebra to rearrange formulas and solve for the missing volume, density, or mass quantity.
Calculating Formula Weight and Molecular Weight
In this interactive object, learners calculate formula and molecular weights by working through five examples and two problems.
Isotopes
The definition of an isotope is illustrated using the three isotopes of carbon. The three isotopes of hydrogen are discussed as exceptions.
The Limiting Reagent in Chemical Reactions
In this interactive object, learners determine the limiting reagent and the excess reagent in chemical reactions. Learners test their knowledge by solving three problems.
The Structure of an Atom
Students examine atomic structure and the octet rule.
Electromagnetic Radiation (Screencast)
In this animated and interactive object, learners examine the inverse proportionality of wavelength and frequency and their relationship to the speed of light.
Gas Volume vs. Pressure (Boyle's Law)
Boyle's Law states that gas volume varies inversely with the pressure at constant temperature and is described by the equation PV = constant. An example of a sample of gas at two conditions of P and V is used to illustrate the law.
Enthalpy (Screencast)
In this interactive object, learners calculate the amount of heat evolved or absorbed in chemical reactions. Four practice problems are provided.
Shapes of Simple Molecules - Part 1 (Screencast)
In this animated and interactive object, learners observe how two, three, or four groups of electrons around the central atom cause the shape of the molecule to be linear, trigonal planar, bent, tetrahedral, or pyramidal. Seven examples and eight interactive questions are provided.