Percent Yield

Front

What is Percent Yield?

Back

Percent Yield is a measure of the efficiency of a reaction, calculated as the ratio of the actual yield to the theoretical yield, multiplied by 100.

Front

How do you calculate Percent Yield?

Back

Percent Yield = (Actual Yield / Theoretical Yield) x 100.

Front

What is Theoretical Yield?

Back

Theoretical Yield is the maximum amount of product that can be produced in a chemical reaction based on the stoichiometry of the balanced equation.

Front

What is Actual Yield?

Back

Actual Yield is the amount of product that is actually obtained from a chemical reaction.

Front

What does a Percent Yield of over 100% indicate?

Back

A Percent Yield over 100% indicates that there may have been an error in measurement or that impurities were included in the product.

Front

What is the significance of a low Percent Yield?

Back

A low Percent Yield indicates that the reaction was not efficient, possibly due to side reactions, incomplete reactions, or loss of product during recovery.

Front

In the reaction 2Fe2O3 + 3C → 4Fe + 3CO2, if 28 grams of carbon is used, how do you find the theoretical yield of CO2?

Back

First, determine the moles of carbon used, then use stoichiometry to find the moles of CO2 produced, and finally convert moles of CO2 to grams.

Front

If a scientist expects to produce 12.3 grams of product but only collects 10.1 grams, what is the Percent Yield?

Back

Percent Yield = (10.1 g / 12.3 g) x 100 = 82%.

Front

In the reaction P4 + 6Cl2 → 4PCl3, if 75.0g of P4 is used, how do you calculate the theoretical yield of PCl3?

Back

Convert grams of P4 to moles, use the stoichiometry of the reaction to find moles of PCl3 produced, and convert back to grams.

Front

What is the role of stoichiometry in calculating Percent Yield?

Back

Stoichiometry allows you to determine the theoretical yield based on the balanced chemical equation and the amounts of reactants used.