Percent Yield and Percent Error Explained

The video tutorial explains the concept of percent yield in chemistry, highlighting the difference between theoretical and experimental yield. It provides a step-by-step guide on calculating percent yield using a formula and discusses the concept of percent error, illustrating how to measure the accuracy of experimental results compared to theoretical expectations.

What is the law that states mass can neither be created nor destroyed?

• Law of Definite Proportions

• Law of Multiple Proportions

• Law of Conservation of Mass

• Law of Constant Composition

What is the term for the amount of product expected based on calculations?

• Actual Yield

• Practical Yield

• Experimental Yield

• Theoretical Yield

If a student gets 34.2 grams of water instead of the expected 36 grams, what is the 34.2 grams called?

• Theoretical Yield

• Actual Yield

• Experimental Yield

• Predicted Yield

How do you calculate percent yield?

• Theoretical Yield divided by Experimental Yield times 100

• Theoretical Yield minus Experimental Yield times 100

• Experimental Yield divided by Theoretical Yield times 100

• Experimental Yield minus Theoretical Yield times 100

In the example given, what is the percent yield if the experimental yield is 34.2 grams and the theoretical yield is 36 grams?

• 94.8%

• 95.5%

• 94.5%

• 95%

What does a percent yield of 100% indicate?

• The reaction had some errors

• The reaction was perfect with no errors

• The reaction was overestimated

• The reaction was incomplete

What is the theoretical yield in the example problem where the expected amount is 125 grams?

• 125 grams

• 150 grams

• 92.5 grams

• 100 grams

What is the formula for calculating percent error?

• (Experimental Yield + Theoretical Yield) / Experimental Yield * 100

• (Theoretical Yield + Experimental Yield) / Theoretical Yield * 100

• (Experimental Yield - Theoretical Yield) / Experimental Yield * 100

• (Theoretical Yield - Experimental Yield) / Theoretical Yield * 100

If the theoretical yield is 36 grams and the experimental yield is 34.2 grams, what is the percent error?

• 4.8%

• 5.5%

• 4.5%

• 5%

What does a high percent error indicate about an experiment?

• The experiment was very accurate

• The experiment had significant errors

• The experiment was perfect

• The experiment was underestimated