Lime, Ca(OH) 2, can be used to neutralize an acid spill. A...

Lime, Ca(OH) 2, can be used to neutralize an acid spill.
A 5.57-g sample of Ca(OH)2 reacts with an excess of
hydrochloric acid; 7.41 g of calcium chloride is collected.
What is the percent yield of this experiment?
Ca(OH) 2 2HCl ¡ CaCl2 2H2O
Sequential Reactions

Key Concepts

Percent Yield

Percent yield quantifies the efficiency of a reaction by comparing the actual yield (the amount of product obtained from an experiment) to the theoretical yield (the maximum possible amount predicted by stoichiometry). It is calculated by dividing the actual yield by the theoretical yield and multiplying by 100%. This metric helps in assessing the performance and possible losses in a chemical reaction.

Theoretical Yield

The theoretical yield is the maximum amount of product that could be generated from a given amount of reactant based on the stoichiometry of the balanced chemical equation. It is determined by converting the mass of the limiting reactant to moles and then using the mole ratio to find the expected mass of the product.

Balanced Chemical Equation

A balanced chemical equation shows the relationship between the reactants and products in a reaction, ensuring that the number of atoms for each element is conserved. It provides the mole ratios necessary for converting between the quantities of different substances in the reaction.

Stoichiometry

Stoichiometry is the method of using the relationships between the moles of reactants and products as dictated by a balanced equation to calculate the quantities involved in a chemical reaction. It allows you to predict how much product can be formed from a given amount of reactant.

Molar Mass

Molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol). It is used to convert between the mass of a substance and the number of moles, which is essential for performing stoichiometric calculations.

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