Limiting Reagent

What is the limiting reactant if 15 GRAMS of NH₃  react  with 16 GRAMS of NO?
4NH₃+6NO --> 5N₂ + 6H₂O
(Remember, convert grams to moles, then divide each substance by the number of moles given as the coefficient from the balanced chemical equation).

• NH₃ is the limiting because the reaction only requires 0.22 mol of NH₃

• NO is the limiting reactant because the reaction only requires 0.088 mol NO 

• NH₃ is the limiting because the reaction only requires 0.88 mol of NH₃

• NO is the limiting reactant because the reaction only requires 0.53 mol NO 

Tags

NGSS.HS-PS1-7

A reactant that is totally consumed during a chemical reaction, limits the extent of the reaction, and determines the amount of product

• stoichiometry

• mole ratio

• excess reactant

• limiting reactant
  

Tags

NGSS.HS-PS1-6

To determine the limiting reactant in a chemical reaction, one must know the

• amount of product formed

• available amount of one of the reactants

• available amount of each of each reactant

• speed of the reaction

How do you determine the limiting reactant?

• Find the amount of product produced by each amount of reactant. The reactant that makes the most is the limiting reactant.

• Find the amount of product produced by each amount of reactant. The reactant that makes the least is the limiting reactant.

• The reactant with the least amount of mass (grams) present is the limiting reactant.

• Cannot be determined.

Body + 4 Tires --> 1 car
How many cars can you make with 92 tires and 34 bodies? 
In this senario the tires would be the _____________  reactant. 

• Limiting 

• Excess 

Tags

NGSS.MS-PS1-5

When the limiting reactant is used up, what happens?

• the reaction speeds up

• the reaction slows down

• the reaction moves to its 2nd stage

• the reaction stops

True or False?
A chemical reaction stops before the limiting reagent is used up.

• True

• False

When does a reaction stop?

• When it wants to

• When both the limiting and excess reactants are gone

• When all the excess reactant has been consumed

• When all the limiting reactant has been consumed

Tags

NGSS.HS-PS1-7

A chemical reaction involving substances A and B stops when B is completely used.  B is the

• excess reactant

• primary reactant

• limiting reactant

• primary product

Mia and David are working on a chemistry experiment. They mix 12 moles of P₄  with 15 moles of O₂. According to the reaction P₄ + 3O₂ --> P₄O₆ , what is the limiting reactant?

• P₄

• O₂

• P₄O₆ 

• none of the above