Limiting Reactants

Front

What is a limiting reactant?

Back

A 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

What happens to the excess reactant in a chemical reaction?

Back

The excess reactant is the substance that remains after the reaction has gone to completion, as it was not completely consumed.

Front

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

Back

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

Front

In the reaction of hydrogen and nitrogen to form ammonia, what is the product?

Back

The product is ammonia (NH3).

Front

If you have 10 pieces of bread, 4 tablespoons of peanut butter, and 20 tablespoons of jelly, which ingredient is the limiting reactant for making sandwiches?

Back

Peanut butter is the limiting reactant.

Front

What does it mean when a chemical reaction is said to have gone to completion?

Back

It means that the limiting reactant has been completely consumed, and no more product can be formed.

Front

In a reaction, if you have 2 moles of A and 3 moles of B, and the balanced equation requires 1 mole of A for every 2 moles of B, which is the limiting reactant?

Back

A is the limiting reactant because you would need 4 moles of B to react with 2 moles of A.

Front

What is the role of stoichiometry in determining limiting reactants?

Back

Stoichiometry allows you to calculate the amounts of reactants needed and products formed based on the balanced chemical equation.

Front

What is an example of a limiting reactant in a real-life scenario?

Back

In making a sandwich, if you have 2 slices of bread and 1 tablespoon of peanut butter, the bread is the limiting reactant if you need 2 slices for one sandwich.