Stoichiometry Limiting Reagent flashcard

Front

What is a limiting reagent?

Back

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

Front

How do you identify the limiting reagent in a reaction?

Back

To identify the limiting reagent, calculate the moles of each reactant and determine which one produces the least amount of product based on the stoichiometry of the balanced equation.

Front

What is stoichiometry?

Back

Stoichiometry is the calculation of reactants and products in chemical reactions based on the conservation of mass and the mole concept.

Front

What is the mole ratio in a balanced chemical equation?

Back

The mole ratio is the ratio of moles of one substance to the moles of another substance in a balanced chemical equation, used to convert between moles of reactants and products.

Front

Given the reaction 2H2 + O2 -> 2H2O, what is the mole ratio of H2 to O2?

Back

The mole ratio of H2 to O2 is 2:1.

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 (H2O) is approximately 18.02 g/mol.

Front

If 4 moles of NH3 react with 5 moles of O2, how many moles of NO are produced in the reaction 4NH3 + 5O2 -> 4NO + 6H2O?

Back

4 moles of NO are produced.

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, calculated using stoichiometry.

Front

What is the actual yield?

Back

The actual yield is the amount of product that is actually obtained from a chemical reaction, which is often less than the theoretical yield.