Limiting Reactant, Percent Yield, and Excess Reactant

Multiple Choice

Define the limiting reactant

• The excess reagents are the reactants that are not used up when the reaction is finished are called .

• The reactant in a reaction which is present in an amount greater than what will be used.

• The limiting reactant (reagent) is the reactant that is completely used up in a reaction.

Multiple Select

Define the excess reactants

• The excess reagents are the reactants that are not used up when the reaction is finished are called .

• The reactant in a reaction which is present in an amount greater than what will be used.

• The (reagent) reactant that is completely used up in a chemical reaction.

Fill in the Blanks

Balance the following equation:

N2 + H2 ---> NH3

Multiple Choice

If you start off with 10 moles of each reactant, how many moles of product can you make

1N2 + 3H2 ---> 2NH3

• 15 mol NH3

• 20 mol NH3

• 10 mol NH3

• 10 mol H2 x (2NH3 / 3H2)

Fill in the Blanks

If you start off with 20 moles of H2 and 10 moles of N2, which reactant is the limiting

1N2 + 3H2 ---> 2NH3