1. How do you make a cheese sandwich? 2Bd + Ch  Bd 2 Ch LiNkEd LiNkeD

2. Making more than one sandwich Using the equation 2Bd + Ch  Bd 2 Ch If you have 10 slices of bread + 7 slices of cheese --> How many sandwiches can you make? Which ingredient “limits” the amount of sandwiches you can make???

3. How many cars can you make? What “limits” the amount of cars you can make??? What “excess” do you have left over??? LiNkeD

4. In a chemical reaction when one of the reactants is used up before the others…. the reaction stops as soon as any one of the reactants are TOTALLY CONSUMED The other reactants will be leftover as excess

5. Limiting reactant – the reactant that is completely consumed in a reaction –This reactant limits the amount of product that can be produced Excess reactant(s) – reactant(s) that which are leftover after the limiting reactant runs out

6. Determine the limiting reactant Fe(s) + S(s)  FeS(s) 2.50 mole Fe react with 3.00 mole S to give FeS which is the limiting reactant? mole Fe mole S mole FeS Before rxn 2.503.000.00 After rxn

7. Example H 2 (g) + O 2 (g)  H 2 O (g) If 10 mol H2 and 7 mol O2 are mixed ??? How many moles of H 2 O can be formed??? What will be leftover as excess??? 22