Percent Error and Yield ENTRANCE TICKET

What is the formula for calculating percent error?

How do you define the theoretical value in an experiment?

• The value obtained from repeated trials

• The value calculated based on known scientific principles

• The value measured during the experiment

• The average of all measured values

What is the formula for calculating percent yield?

If the theoretical value of a reaction is 50 grams and the actual value obtained is 45 grams, what is the percent error?

• 10%

• 5%

• 15%

• 20%

In an experiment, the theoretical yield is 100 grams, and the actual yield is 80 grams. Calculate the percent yield.

• 80%

• 100%

• 120%

• 20%

Why is it important to calculate percent error in experiments?

• To determine the efficiency of the experiment

• To identify the accuracy of the experimental results

• To calculate the cost of the experiment

• To measure the time taken for the experiment

A student calculates a percent error of 5% in their experiment. What does this indicate about their results?

• The results are very accurate

• The results are very inaccurate

• The results are exactly correct

• The results are not useful

If the percent yield of a chemical reaction is greater than 100%, what could be a possible explanation?

• The reaction was incomplete

• There was an error in measuring the actual yield

• The theoretical yield was overestimated

• The reaction was perfectly efficient

In a chemical reaction, you start with 10 grams of reactant A, which should theoretically produce 8 grams of product B. If the actual yield of product B is 6 grams, calculate the theoretical yield and then the percent yield.

• Theoretical Yield: 8 grams, Percent Yield: 75%

• Theoretical Yield: 8 grams, Percent Yield: 80%

• Theoretical Yield: 10 grams, Percent Yield: 60%

• Theoretical Yield: 6 grams, Percent Yield: 100%