Unit 10 Practice: Limiting Reactant

Front

What is a limiting reactant?

Back

The limiting reactant is the substance that is completely consumed in a chemical reaction, limiting the amount of product that can be formed.

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 reaction to the mole ratio required by the balanced equation.

Front

Given the reaction 2 Al + 3 Cl2 -> 2 AlCl3, if you have 2 moles of Al and 2 moles of Cl2, which is the limiting reactant?

Back

Cl2 is the limiting reactant.

Front

In the reaction SO2 + PCl5 -> SOCl2 + POCl3, how much SOCl2 is produced from 16.2g SO2 and 13.7g PCl5?

Back

7.87g of SOCl2 is produced.

Front

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

Back

The mole ratio is 4:6 or 2:3.

Front

If 10 moles of NH3 react with 30.0 moles of NO, which is the limiting reactant?

Back

NH3 is the limiting reactant.

Front

In the reaction P4 + 3O2 -> P4O6, what is the limiting reactant if 12 moles of P4 react with 15 moles of O2?

Back

O2 is the limiting reactant.

Front

What is the balanced equation for the reaction of iron and sulfur to form iron sulfide?

Back

Fe + S -> FeS.

Front

If 7.62g of Fe reacts with 8.67g of S, which is the limiting reactant?

Back

Fe is the limiting reactant.

Front

What is the purpose of stoichiometry in chemical reactions?

Back

Stoichiometry allows us to calculate the amounts of reactants and products involved in a chemical reaction.