Stoichiometry & Reactions
Learn how to balance chemical equations. Use molar relationships to calculate reactants and products and to determine percent composition and percent yield.
Stoichiometry Quiz
Stoichiometry is concerned with the proportions of elements that combine during chemical reactions. Test your understanding of stoichiomety with this fun multiple choice quiz.
Stoichiometry is concerned with the proportions of elements that combine during chemical reactions. Test your understanding of stoichiomety with this fun multiple choice quiz.
Balancing Chemical Equations
Here is a step-by-step tutorial for balancing chemical equations, along with a worked example. This is a must-read for students of general and introductory chemistry!
Here is a step-by-step tutorial for balancing chemical equations, along with a worked example. This is a must-read for students of general and introductory chemistry!
Balancing Redox Reactions
Get step-by-step instructions for balancing redox reactions for conservation of mass and charge in electrochemistry.
Get step-by-step instructions for balancing redox reactions for conservation of mass and charge in electrochemistry.
Chemical Reaction Orders
Learn how to classify chemical reactions using kinetics. Identify and define zero, first, second, mixed, and higher order reactions.
Learn how to classify chemical reactions using kinetics. Identify and define zero, first, second, mixed, and higher order reactions.
Catalysts and Catalysis
Learn what catalysts are and how they affect the activation energy and reaction rate of a chemical reaction.
Learn what catalysts are and how they affect the activation energy and reaction rate of a chemical reaction.
Common Polyatomic Ions
This is a table of some of the most common polyatomic ions. Names, formulae, and charges are listed.
This is a table of some of the most common polyatomic ions. Names, formulae, and charges are listed.
Diagram of Redox Half-Reactions
This is a diagram explaining the components of redox (oxidation-reduction) half-reactions.
This is a diagram explaining the components of redox (oxidation-reduction) half-reactions.
Endothermic and Exothermic Reactions
Learn about endothermic and exothermic chemical reactions and get instructions to perform your own hot and cold chemistry demonstrations.
Learn about endothermic and exothermic chemical reactions and get instructions to perform your own hot and cold chemistry demonstrations.
Factors that Affect Chemical Reaction Rate
Here's a list and description of the major factors that can affect the rate of a chemical reaction. Links for more detailed information are also provided.
Here's a list and description of the major factors that can affect the rate of a chemical reaction. Links for more detailed information are also provided.
Laws of Thermochemistry
Certain rules or laws apply to thermochemical equations and enthalpy. These are explanations and examples of these laws, including Hess's Law.
Certain rules or laws apply to thermochemical equations and enthalpy. These are explanations and examples of these laws, including Hess's Law.
Le Chatelier's Principle
Learn what Le Chatelier's Principle is and how it can be applied to predict the effect of a change in conditions on chemical equilibrium.
Learn what Le Chatelier's Principle is and how it can be applied to predict the effect of a change in conditions on chemical equilibrium.
Molecules and Moles
Learn how molecules, moles, and Avogadro's number relate to each other. This is a good introduction to the study of compounds and stoichiometry.
Learn how molecules, moles, and Avogadro's number relate to each other. This is a good introduction to the study of compounds and stoichiometry.
Reactions in Water or Aqueous Solution
Let's review some important types of reactions that occur in aqueous solution and take a look at the rules that are used when writing balanced equations for water reactions.
Let's review some important types of reactions that occur in aqueous solution and take a look at the rules that are used when writing balanced equations for water reactions.
Rules for Assigning Oxidation Numbers
Learn how to assign oxidation numbers to keep track of the distribution of electrons during a chemical reaction.
Learn how to assign oxidation numbers to keep track of the distribution of electrons during a chemical reaction.
Salt Formation Chemistry
Learn about the chemistry behind salt formation, including neutralization and hydrolysis reactions.
Learn about the chemistry behind salt formation, including neutralization and hydrolysis reactions.
Solubility Product Constants at 25 Degrees Celsius
This is a table of the solubility product constants for some common ions in aqueous solution at 25 degrees Celsius.
This is a table of the solubility product constants for some common ions in aqueous solution at 25 degrees Celsius.
Types of Chemical Reactions
Learn about the different types of chemical reactions and get examples of the reaction types.
Learn about the different types of chemical reactions and get examples of the reaction types.
Types of Inorganic Chemical Reactions
There are four main categories of inorganic chemical reactions. Can you name them all? Here they are, along with examples of each type.
There are four main categories of inorganic chemical reactions. Can you name them all? Here they are, along with examples of each type.
What Is a Mole and Why Are Moles Used?
No, we're not talking about the small burrowing mammal! Here's a look at a standard unit in chemistry and why it's used.
No, we're not talking about the small burrowing mammal! Here's a look at a standard unit in chemistry and why it's used.
Chemical Calculations with Clarity
An alternative, algebraic, approach to stoichiometry. From William Davies, Emporia State University.
An alternative, algebraic, approach to stoichiometry. From William Davies, Emporia State University.
Honors Chemistry I
Lecture notes and problems including bonding theory, chemical equilibrium, stoichiometry, and acid/base concepts. From Mark Tuckerman, New York University.
Lecture notes and problems including bonding theory, chemical equilibrium, stoichiometry, and acid/base concepts. From Mark Tuckerman, New York University.
Moles, Percents, and Stoichiometry
Importance of moles in solving chemical equation problems. From ChemTutor.
Importance of moles in solving chemical equation problems. From ChemTutor.
S-cool Chemistry
A-level introductions to general, organic, and inorganic chemistry, with additional material in electrochemistry, polymers, stoichiometry, and atomic structure.
A-level introductions to general, organic, and inorganic chemistry, with additional material in electrochemistry, polymers, stoichiometry, and atomic structure.
ThinkQuest: Stoichiometry
Interconversion of grams and moles in balancing chemical equations.
Interconversion of grams and moles in balancing chemical equations.
Types of Equations
The basic chemical reactions and equation balancing. From Gwen Sibert, Roanoke Valley Governor's School.
The basic chemical reactions and equation balancing. From Gwen Sibert, Roanoke Valley Governor's School.