Limiting/Excess Reactants

Front

What is a limiting reagent?

Back

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

Front

Why is it important to identify the limiting reagent?

Back

The limiting reagent controls the amount of product formed in a chemical reaction.

Front

What is an excess reactant?

Back

An excess reactant is the substance that is not completely used up in a reaction and remains after the reaction has occurred.

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 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 a sandwich-making scenario, if you need 2 pieces of bread, 1 tablespoon of peanut butter, and 2 tablespoons of jelly, what is the limiting reactant if you have 10 pieces of bread, 4 tablespoons of peanut butter, and 20 tablespoons of jelly?

Back

Peanut butter is the limiting reactant.

Front

What happens if there is no limiting reagent in a reaction?

Back

If there is no limiting reagent, all reactants are present in excess, and the reaction can proceed until one of the reactants is completely consumed.

Front

How many grilled cheeses can you make with 26 slices of bread and 14 pieces of cheese if the recipe is 1 Cheese + 2 Bread -> 1 grilled cheese?

Back

You can make 13 grilled cheeses.

Front

What is stoichiometry?

Back

Stoichiometry is the calculation of reactants and products in chemical reactions based on the balanced equation.

Front

What is the mole ratio in a balanced chemical equation?

Back

The mole ratio is the ratio of the coefficients of the reactants and products in a balanced chemical equation, indicating the proportions in which they react or are produced.