Limiting Reactant Review

Front

What is the limiting reactant?

Back

The limiting reactant is the reactant that is used up first in a chemical reaction, determining the amount of product formed.

Front

In the reaction P4 + 3O2 → P4O6, if you have 12 moles of P4 and 15 moles of O2, which is the limiting reactant?

Back

O2 is the limiting reactant because it will be used up first before P4.

Front

What do you call a reactant that you have enough of and does not run out?

Back

Excess Reactant.

Front

In the reaction 4NH3 + 6NO → 5N2 + 6H2O, how much water can be made if 8 moles of NH3 react with 6 moles of NO?

Back

6 moles of water can be produced.

Front

In the reaction P4 + 3O2 → P4O6, how many moles of P4O6 can be made if 3 moles of P4 react with 6 moles of O2?

Back

2 moles of P4O6 can be produced.

Front

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

Back

The limiting reactant controls the amount of product that can be formed in a chemical reaction.

Front

How do you identify the limiting reactant in a reaction?

Back

To identify the limiting reactant, compare the mole ratio of the reactants used in the balanced equation to the moles available.

Front

What happens to the excess reactant in a chemical reaction?

Back

The excess reactant remains unreacted after the reaction is complete.

Front

If 10 moles of A react with 15 moles of B to produce C, and A is the limiting reactant, what can be said about B?

Back

B is the excess reactant, as it is not completely used up.

Front

In a balanced chemical equation, what does the coefficient represent?

Back

The coefficient represents the number of moles of each reactant and product involved in the reaction.