Unit 10 BR #4: 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, calculate the moles of each reactant and determine which reactant will produce the least amount of product based on the balanced equation.

Front

What is the first step in solving a stoichiometry problem?

Back

The first step is to write a balanced chemical equation for the reaction.

Front

What is stoichiometry?

Back

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

Front

Why is it important to balance a chemical equation?

Back

Balancing a chemical equation ensures that the law of conservation of mass is followed, meaning the number of atoms of each element is the same on both sides of the equation.

Front

What is the mole ratio?

Back

The mole ratio is the ratio of moles of one substance to the moles of another substance in a balanced chemical equation.

Front

How do you convert grams to moles?

Back

To convert grams to moles, divide the mass of the substance (in grams) by its molar mass (in g/mol).

Front

What is the molar mass of water (H2O)?

Back

The molar mass of water is approximately 18.02 g/mol.

Front

What happens if one reactant is in excess?

Back

If one reactant is in excess, it will not be completely consumed in the reaction, and the limiting reactant will determine the amount of product formed.

Front

What is the theoretical yield?

Back

The theoretical yield is the maximum amount of product that can be produced from a given amount of reactants, based on stoichiometric calculations.