ABSTRACT

Stoichiometry (“measuring elements”) and stoichiometric calculations are methods for comparing and calculating specific amounts of elements or compounds used (as reactants) or formed (as products) in a chemical reaction based on the ratios in the balanced equation. The balanced equation represents the specific molar ratio of reactants that must be combined to form a specific molar ratio of corresponding products. The molar ratios of all reactants and products for a specific reaction are represented by the stoichiometric coefficients. The limiting reagent is the reactant in shortest supply that limits the formation of product and, thus, determines the true theoretical yield. The total amount of all products and all reactants after the completion of a reaction can be determined by the extension of stoichiometry calculations. The theoretical yield of all products in a reaction can be calculated from the limiting reagent; the calculation process is simply extended to each possible product.