Stoichiometry, Limiting, Excess, Percent Yield

The limiting reactant is the reactant that __________ .

• slows down the reaction

• used up first

• left over at the end of reaction

• controls the speed of the reaction

Theoretical yield = 73g

Actual yield = 62g

Calculate the percent yield.

• 17.7%

• 117.7%

• 84.9%

• 15.1%

4NH₃ + 5O₂ → 4NO + 6H₂O

Based on reaction above, oxygen is a limiting reactant. Calculate the mass of NO formed if the mass of oxygen reacted is 1.80g.

• 0.37g

• 0.045g

• 1.35g

• 11.1g

Tags

NGSS.HS-PS1-7

What is a limiting reactant?

• The reactant that determines how much product can be made

• The reactant that is in excess

• The product that you can make the most of

• The amount of reactants that react with each other

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

2H₂   +   O₂  →  2H₂O
How many moles of water can be produced if 8 moles H₂ are used?

• 4 moles
• 8 moles
• 16 moles
• 2 moles

Tags

NGSS.HS-PS1-7

2NaClO₃ (s) → 2NaCl (s) + 3O₂ (g)

12.00 moles of NaClO₃ will produce how many grams of O₂?

• 96g

• 576g

• 288g

• 384g

This is what you call a reactant that you have enough of. The one that DOES NOT run out.

• Limiting Reactant

• Excess Reactant

• Highly Reactant

• Super Reactant

1 Body + 4 Tires → 1 Car

How many cars can you make with 92 tires and 34 bodies?

• 23

• 34

• 68

• 46

What is the theoretical yield?

• the maximum amount of product from a reaction
• the amount of product recovered from a lab experiment
• amount of product that causes the reaction to stop
• the amount of product needed to reverse the reaction