Stoichiometry and 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 formed.

Front

What is an excess reactant?

Back

An excess reactant is a substance that is not completely consumed in a chemical reaction and remains after the reaction is complete.

Front

In the reaction Cl2 + 2KBr → Br2 + 2KCl, what is produced?

Back

Potassium chloride (KCl) and bromine (Br2) are produced.

Front

How do you determine the limiting reactant in a reaction?

Back

To determine the limiting reactant, compare the mole ratio of the reactants used in the reaction to the mole ratio required by the balanced equation.

Front

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

Back

Peanut butter is the limiting reactant.

Front

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

Back

The mole ratio of NH3 to H2O is 4:6 or 2:3.

Front

How many moles of water can be produced from 8 moles of NH3 reacting with 6 moles of NO?

Back

6 moles of water can be produced.

Front

In the equation 1 Body + 4 Tires → 1 car, how many cars can be made with 92 tires and 34 bodies?

Back

23 cars can be made.

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 purpose of a balanced chemical equation?

Back

A balanced chemical equation ensures that the number of atoms for each element is conserved in a chemical reaction.