Excess Reactant  Too much to react with the other reactant


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Excess Reactant  Too much to react with the other reactant

  • Excess Reactant  Too much to react with the other reactant



Limiting Reactant  not enoughlimits the amount of product

  • Limiting Reactant  not enoughlimits the amount of product





You are baking cakes with the Swedish Chef

  • You are baking cakes with the Swedish Chef

  • For 1 Cake You need:

    • 2 cups flour; 3 eggs; 1 pound of butter; 1 cup of milk
    • You have 18 cups of flour; 15 eggs; 6 pounds of butter; 8 cups of milk


If 80.2 g of Ca is mixed with 475.2 g of Br2, which reactant is INXS?

  • If 80.2 g of Ca is mixed with 475.2 g of Br2, which reactant is INXS?

  • Step 1 Covert to moles



If 80.2 g of Ca is mixed with 475.2 g of Br2, which reactant is INXS?

  • If 80.2 g of Ca is mixed with 475.2 g of Br2, which reactant is INXS?

  • Step 1 Covert to moles



If 80.2 g of Ca is mixed with 475.2 g of Br2, which reactant is INXS?

  • If 80.2 g of Ca is mixed with 475.2 g of Br2, which reactant is INXS?

  • Step 2 Revisit Equation



If 108.0 g of Al is mixed with 400 g of Cl2 which reactant is in excess?

  • If 108.0 g of Al is mixed with 400 g of Cl2 which reactant is in excess?

  • Directions:

  • Pick a product

  • Calculate the mass of this product starting with each reactant

  • (one from 108.0g Al)

  • (one from 400.0g Cl2)



If 108.0 g of Al is mixed with 400 g of Cl2 which reactant is in excess?

  • If 108.0 g of Al is mixed with 400 g of Cl2 which reactant is in excess?

  • Directions:

  • Whichever reactant gives you the larger mass of the product is the excess reactant

  • The reactant which is not in excess is the limiting reactant



If 108.0 g of Al is mixed with 400 g of Cl2 which reactant is in excess?

  • If 108.0 g of Al is mixed with 400 g of Cl2 which reactant is in excess?



If 108.0 g of Al is mixed with 400 g of Cl2 which reactant is in excess?

  • If 108.0 g of Al is mixed with 400 g of Cl2 which reactant is in excess?



Which mass of AlCl3 is actually formed?

  • Which mass of AlCl3 is actually formed?



When 108.0 g of C2H6 is mixed with 360.8 g of O2 which reactant is in excess?

  • When 108.0 g of C2H6 is mixed with 360.8 g of O2 which reactant is in excess?

  • What volume of CO2 is produced at STP?

  • What mass of water is produced?

  • What mass of the excess reactant is actually reacted?

  • What mass of the excess reactant is left over?



When 108.0 g of C2H6 is mixed with 360.8 g of O2 which reactant is in excess?

  • When 108.0 g of C2H6 is mixed with 360.8 g of O2 which reactant is in excess?

  • Start with C2H6



When 108.0 g of C2H6 is mixed with 360.8 g of O2 which reactant is in excess?

  • When 108.0 g of C2H6 is mixed with 360.8 g of O2 which reactant is in excess?

  • Start with O2



What volume of CO2 is produced at STP?

  • What volume of CO2 is produced at STP?

  • Start with LR (O2)



What mass of water is produced?

  • What mass of water is produced?



What mass of the excess reactant is actually reacted?

  • What mass of the excess reactant is actually reacted?



What mass of the excess reactant is left over?

  • What mass of the excess reactant is left over?



Do Exercises 26-28 on page 133

  • Do Exercises 26-28 on page 133



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