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.
By Jill Larson
In this animated object, students examine the role equilibrium plays in everyday life. Formulas are presented in an interactive way.
Gas Volume vs. Temperature (Charles's Law)
By Dr. Miriam Douglass, Dr. Martin McClinton
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.
Pressure and Boyle's Law
Students examine standard pressure in this interactive object.
Oxidation States of Ions
By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton
Learners examine the periodic table to identify metallic elements that have either fixed or variable oxidation states.
Dilution of Hydrochloric Acid
In this interactive object, learners examine how to properly dilute hydrochloric acid.
The Hydrogen Bond
In this interactive object, students examine a type of chemical bond known as the "hydrogen bond."
In this interactive object, the learner practices identifying charges on ions.
Introduction to the Periodic Table
By Mona Wenrich
Students read about the basic organization and structure of the periodic table of elements. By clicking on the symbol, they can read that element's atomic number and weight. In an exercise, students identify elements as belonging to a group, a period, or neither.
Ions are electrically charged particles obtained from an atom or from a chemically bonded group of atoms by adding or removing electrons. Eight examples illustrate the number of protons, neutrons, and electrons in positive ions (cations) and in negative ions (anions).
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.
Learners examine phase diagrams that show the phases of solid, liquid, and gas as well as the triple point and critical point.
The Three States of Matter
In this animated and interactive object, learners examine the properties of liquids, solids, and gases.
Biomolecules The Carbohydrates
By Barbara Liang
Learners read a brief introduction to monosaccharides, disaccharides, and polysaccharides. The processes for dehydration synthesis and hydrolysis are shown.
Biomolecules: The Carbohydrates (Video)
By Becky Polk-Pohlman
Viewers watch an introduction to monosaccharides, disaccharides, and polysaccharides. The processes for dehydration synthesis and hydrolysis.