Limiting Reactants

Front

What is a limiting reactant?

Back

A limiting reactant is the substance 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 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

In the reaction Fe + S -> FeS, if 7.62g Fe reacts with 8.67g S, which is the limiting reactant?

Back

Fe is the limiting reactant.

Front

What happens to the limiting reactant during a chemical reaction?

Back

The limiting reactant is used up first, stopping the reaction when it is completely consumed.

Front

What is the effect of the limiting reactant on the amount of product formed?

Back

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

Front

In a reaction, if one reactant is present in excess, what does that mean?

Back

It means that there is more of that reactant than is needed to completely react with the limiting reactant.

Front

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

Back

A reactant is a substance that undergoes a change during a chemical reaction to form products.

Front

In the formation of NH3 from H2 and N2, if there are 5 moles of H2 and 3 moles of N2, which is the limiting reactant?

Back

H2 is the limiting reactant.

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has equal numbers of each type of atom on both sides of the equation, reflecting the conservation of mass.

Front

What does it mean if a reactant is in excess?

Back

A reactant is in excess if there is more of it than is required to completely react with the limiting reactant.