Example: FeS(s) + O2(g) Fe2O3(s) + SO2(g) How many grams of FeS are needed to make 36.3 g of Fe2O3? Limiting Reactants In many reactions, one reactant becomes entirely consumed and the other reactant, or reactants, is left over. The reactant that becomes consumed is called the ______________________ or limiting reagent or limiting factor. It is called the limiting reactant because when it is all gone no more products can be created the reactant limits the amount of product formed. The – reactants remaining are called the _______________________. Analogy Let’s say you are making a ham and cheese sandwiches. You have 10 pieces of cheese, 10 pieces of and 10 pieces of ham. How many sandwiches can you make? Will there be anything left over? 2 bread + 3 slices ham + 1 cheese 1 sandwich You have enough bread to make _____ sandwiches You have enough cheese to make _____ sandwiches You have enough ham to make _____ sandwiches ___________________ is the limiting reactant. It limits the number of sandwiches that can be made.
Example: FeS(s) + O2(g) Fe2O3(s) + SO2(g) How many grams of FeS are needed to make 36.3 g of Fe2O3? Limiting Reactants In many reactions, one reactant becomes entirely consumed and the other reactant, or reactants, is left over. The reactant that becomes consumed is called the ______________________ or limiting reagent or limiting factor. It is called the limiting reactant because when it is all gone no more products can be created – the reactant limits the amount of product formed. The reactants remaining are called the _______________________. Analogy Let’s say you are making a ham and cheese sandwiches. You have 10 pieces of cheese, 10 pieces of and 10 pieces of ham. How many sandwiches can you make? Will there be anything left over? 2 bread + 3 slices ham + 1 cheese 1 sandwich You have enough bread to make _____ sandwiches You have enough cheese to make _____ sandwiches You have enough ham to make _____ sandwiches ___________________ is the limiting reactant. It limits the number of sandwiches that can be made.