Limiting Reactants

Front

What is a limiting reactant?

Back

A limiting reactant is a reactant that is completely consumed in a chemical reaction, determining the maximum amount of product that can be formed.

Front

How do you identify the limiting reactant in a chemical reaction?

Back

To identify the limiting reactant, compare the mole ratio of the reactants used in the reaction to the coefficients in the balanced chemical equation.

Front

Given the reaction: 4 NH₃ + 6 NO → 5 N₂ + 6 H₂O, how many moles of water can be produced from 8 moles of NH₃ and 6 moles of NO?

Back

6 moles of water can be produced.

Front

In the reaction Fe₂O₃ + 3H₂ → 2Fe + 3H₂O, if you have 6 moles of H₂ and excess Fe₂O₃, how many moles of iron can be produced?

Back

4 moles of iron can be produced.

Front

What happens to the limiting reactant during a chemical reaction?

Back

The limiting reactant is consumed completely, stopping the reaction when it runs out.

Front

If a reactant is used up first in a reaction, what is it called?

Back

It is called the limiting reactant.

Front

In the reaction 4 NH₃ + 6 NO → 5 N₂ + 6 H₂O, which reactant is the limiting reactant if you start with 10 moles of NH₃ and 30 moles of NO?

Back

NH₃ is the limiting reactant.

Front

What is the significance of the limiting reactant in a chemical reaction?

Back

The limiting reactant determines the amount of product that can be formed in the reaction.

Front

What is the mole ratio of NH₃ to NO in the reaction 4 NH₃ + 6 NO → 5 N₂ + 6 H₂O?

Back

The mole ratio of NH₃ to NO is 4:6 or 2:3.

Front

If you have 12 moles of NO and 8 moles of NH₃, which reactant is in excess?

Back

NO is in excess.