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) × 100.

Front

What is the theoretical yield?

Back

Theoretical yield is the maximum amount of product that can be produced in a chemical reaction based on the amounts of reactants used.

Front

What is the actual yield?

Back

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

Front

If the theoretical yield is 50g and the actual yield is 40g, what is the percent yield?

Back

Percent yield = (40g / 50g) × 100 = 80%.

Front

What factors can affect the percent yield of a reaction?

Back

Factors include incomplete reactions, side reactions, measurement errors, and losses during product recovery.

Front

In the equation 2Fe2O3 + C → Fe + 3CO2, what is the limiting reactant?

Back

The limiting reactant is the reactant that is completely consumed first, limiting the amount of product formed.

Front

What is the significance of the limiting reactant in a chemical reaction?

Back

The limiting reactant determines the maximum amount of product that can be formed in a reaction.

Front

How can you determine the theoretical yield from a balanced chemical equation?

Back

Theoretical yield can be calculated using stoichiometry based on the balanced equation and the amounts of reactants.

Front

What is a common mistake when calculating percent yield?

Back

A common mistake is to confuse actual yield with theoretical yield or to miscalculate one of the values.