Calculating Percent Yield is EASY!

The video tutorial explains how to calculate percent yield using the formula: actual yield divided by theoretical yield, multiplied by 100. It covers the definitions of percent yield, actual yield, and theoretical yield, and provides examples to illustrate the calculation process. The video also addresses common misconceptions, such as why a percent yield over 100% indicates contamination rather than extra product.

What does a percent yield of 90% indicate in a chemical reaction?

• You made 90% of the product you should have.

• You made 90% more product than expected.

• You made 10% less product than expected.

• You made 10% more product than expected.

How is the actual yield typically determined in a lab setting?

• By estimating it based on reactants.

• By measuring it during the experiment.

• By calculating it using stoichiometry.

• By using a theoretical formula.

What is the first step in calculating percent yield?

• Divide the actual yield by the theoretical yield.

• Subtract the actual yield from the theoretical yield.

• Divide the theoretical yield by the actual yield.

• Multiply the actual yield by 100.

In the example problem, what is the percent yield if the theoretical yield is 75g and the actual yield is 55g?

• 100%

• 73.33%

• 90%

• 80%

What is the first step in solving a more complex percent yield problem involving stoichiometry?

• Calculate the actual yield.

• Determine the reactants used.

• Find the theoretical yield using stoichiometry.

• Estimate the percent yield directly.

Why is a percent yield over 100% considered problematic?

• It indicates a perfect reaction.

• It suggests contamination in the product.

• It means more product was made than possible.

• It shows an error in the theoretical yield.

In the complex example, what is the theoretical yield of O2 if starting with 40 grams of KClO3?

• 40g

• 14.9g

• 15.84g

• 75g