National Institute of Open Schooling
Chemical Arithmetics
Substances with the same empirical and molecular formula must be differentiated by their structural formula. Part two in a series of 36 has pupils using chemical formulas to calculate how much of a compound is present in a given...
American Chemical Society
Development of Baking Powder
Did you know baking powder can be used to treat acne, whiten teeth, and make sugar cookies? The lesson plan on the development of baking powder is ready-to-go with no preparation required. Through readings, pupils answer questions,...
Frostburg State University
General Chemistry Online: Gases Faq
Float away with the answers to many frequently asked questions about gases. Understand Avogadro, reaction stoichiometry and more.
Chem4kids
Chem4 Kids: Stoichiometry
This site provides a great overview of stoichiometry, the part of chemistry that studies amounts of substances that are involved in reactions. Content focuses on what you measure, and includes two examples.
University of Oxford (UK)
University of Oxford: Solid State Chemistry: Non Stoichiometry
Discover what makes a non-stoichiometric compound.
Chem Tutor
Chem Tutor: Dissolving Gases Into Liquids
Description of the factors influencing gas solubility. This site also provides other chemistry related questions. Topics include dissolving solids into liquids, concentration, and stoichiometry.
Savvas Learning
Chemistry, the Central Science: Enthalpies of Formation
A section from a textbook about enthalpies of formation. Includes practice exercises, a table of enthalpy values, and examples.
Frostburg State University
General Chemistry Online: Dalton's Atomic Theory
Discusses John Dalton's development of the atomic theory and the four main points of his theory. Includes references and a link to a quiz on Dalton's Atomic theory.
Wyzant
Wyzant: Chem Tutor: Gases
A lengthy page covering most all the gas laws. Each law is described in words and stated as an equation. The use of each law in solving problems is demonstrated. Some problem-solving tips are provided. There are 23 practice problems with...