In this lesson our instructor talks about stoichiometry. First, he discusses molarity and dilutions. Then he talks about the double-displacement precipitation reactions, neutralization reactions, and acid-base standardization. Lastly, he lectures on experimental setup and an example on acid-base standardization. He ends the lesson with a summary and two helpful sample problems. Stoichiometry II Stoichiometry uses coefficients from a balanced chemical equation as a conversion factor to relate any (2) reactants and/or products. Mole to mole ratios are central to any stoichiometry problem. The limiting reagent or reactant dictates how much product is expected to form (known as the theoretical yield). Molarity expresses solution concentration, and can be used as a conversion factor. Acid-base titrations are used to determine (or standardize) the concentration of an unknown solution.