Name ______________________________________________________ Date ________________ Period ________
Limiting Reactants/Reagents and Percent Yield of a Chemical Reaction
https://www.youtube.com/watch?v=LicEaaXhlEY
I. Limiting Reactant
Example 1: Nestle’s Chocolate Chip Cookies (recipe given)
Recipe calls for 2 eggs, but I only have _____________ . This will limit the number of cookies that I can make.
In this example, the limiting reactant is _____________ .
In a balanced Chemical Equation, the numbers in front of the reactants and products are called the ________________ .
Think of these numbers as the amounts, like in our recipe example.
Example 2: Hydrogen Combustion (main rocket chamber in the space shuttle)
2H2 + O2 → 2H2O
Try This: Circle the one that we would use up first (limiting reactant)? How many water molecules can we
make? _________ Leftovers? ____________
4H2 + 3O2 →
REACTANTS PRODUCT
Example 3: Combustion of methane (how a Bunsen burner works)
CH4 + 2O2 → CO2 + 2H2O
Try This: Circle the one that we would use up first (limiting reactant)? How many water molecules can we
make? _________ How many carbon dioxide molecules? ___________ Leftovers? ____________
CH4 + 4O2 →
REACTANTS PRODUCTS
