Limiting Reactants and Percent Yield

The limiting reactant

• slows the reaction down

• is used up first

• is the reactant that is left over

• controls the speed of the reaction

Use the equation 2 Al + 3 Cl₂ ---> 2 AlCl₃.  If 2 moles of aluminum and 2 moles of chlorine are reacted, identify the limiting reactant.

• AlCl3

• Cl2

• Al

Tags

NGSS.HS-PS1-7

Theoretical yield = 73g
Actual yield = 62g
Calculate the percent yield.

• 16%

• 116%

• 85%

• 76%

In a lab, a scientist calculate he should produce 12.3 grams of product in his experiment. When he is finished collecting his product it weighs 10.1 grams. What is his percent yield?

• 82%

• 0.82%

• 10.1 %

• 100%

• 80%

• 90%

• 95%

• 100%

When reacting Na with Cl₂, we calculated that the theoretical yield should be 12.5 grams. Our actual yield was 13.0 grams. What is the percent yield?

• 100%

• 104%

• 96%

• 1.04

What is the limiting reactant if 10 moles of NH₃ react with 30.0 moles of NO? 4NH₃ + 6NO ⟶ 5N₂ + 6H₂O

• NH₃

• NO

• N₂

• water

Tags

NGSS.HS-PS1-7

You need 2 pieces of bread, 1 tablespoon of peanut butter and 2 tablespoons of starwberry jelly to make a sandwich. If you have 10 pieces of bread, 4 tablespoons of peanut butter and 15 tablespoons of jelly, what is the limiting reactant?

• bread

• strawberry jelly

• peanut butter

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The amount of product that actually forms when a chemical reaction is carried out in a laboratory is called the _________ yield.

• actual

• theoretical

• percent

Tags

NGSS.HS-PS1-7

It is the reactant that produces a lesser amount of product. (a)  

• Excess Reactant

• Percent Yield

• Limiting Reactant

• Co-Factor