A video demonstration of The Mole and Avogadro's Number from Salman Khan of Khan Academy.
Khan Academy

Brief explanations of terms and formula plus variations of the formula
AusETute

A clear description and example of creating dilutions.
Clackamas Community College Dilutions Calculations

How to form dilutions of solutions.
Mountain Empire Community College dilutions page

another clear description of solution concentrations, with examples.
Mountain Empire Community College solutions page

Describes how to calculate the weight percent of a solute in solution. Provides worked examples and practice problems with answers.
Weight Percent

How to calculate the volume percent of a solute in a solution.
Volume Percent

How to calculate normality, specifically how it may differ from molarity.
Normality

How to find the concentration of a chemical species (ions) in a solution.
Species Concentration

How to solve dilution problems using molarity of solutions. Practice problems with answers are included.
Dilution Calculations
