Chemistry - the Complete Course Series, teaches students quantitative reasoning to solve chemistry problems. The 30 volume series covers all aspects of Chemistry from density to the mole, to molarity, stoichiometry and equilibrium. It demonstrates how to ask meaningful questions and conduct careful investigations to build knowledge of chemical and physical concepts and develop the skills to solve mathematical and scientific problems. In this program some very fundamental questions are considered. What is a "chemical reaction?" When we mix substances, how can we tell if a chemical reaction has occurred? How do we write equations for chemical reactions? How do we "balance" chemical equations, and what are we really doing when we do this? This volume teaches the formation of a precipitate can indicate a chemical reaction. In order to correctly write a chemical equation, you must know the correct formulas for all the reactants and products. How chemical equations balance, and what "balancing" really means.