What is a Limiting Reagent?
The limiting reagent is the reactant that is in shortest supply. The limiting reagent controls the rate of the reaction because it is the only reactant that can be used up. The other reactants are in excess and can continue to react even after the limiting reagent is used up.
Limiting Reagent Definition
The limiting reagent is the reactant in a chemical equation that is in shortest supply. The other reactants in the equation will then react with the limiting reagent until it is all used up.
Limiting Reagent Examples
In chemistry, a limiting reagent (LR) is a reactant that controls the amount of product that can be formed in a chemical reaction. The other reactant is called the excess reagent.
A simple example of a limiting reagent is the reaction of sodium with water. In this reaction, sodium is the limiting reagent because it determines how much water can be converted into sodium hydroxide. The excess reagent is water.
In another example, consider the reaction of sulfur dioxide with oxygen to form sulfur trioxide. In this reaction, sulfur dioxide is the limiting reagent because it determines how much sulfur trioxide can be formed. The excess reagent is oxygen.
How to Find Limiting Reagent in a Reaction?
The limiting reagent in a reaction is the reagent that is depleted first. The limiting reagent can be determined by calculating the amount of product that can be formed based on the amount of each reagent present. The limiting reagent is the reagent that limits the amount of product that can be formed.
Limiting Reagent Problems
1) A chemist is preparing to synthesize a compound that requires the use of 1.5 mol of sulfuric acid. He has a 2.0 mol bottle of sulfuric acid. How much of the acid can he use?
The chemist can use up to 1.0 mol of the sulfuric acid.