Percent Error in Chemistry

Which student had the MOST ACCURATE results?

• Ash

• Casey

• Blake

Tags

NGSS.MS-PS3-1

In science, a percent error of _______ or less is considered accurate

• 10%

• 100%

• 5%

• 50%

What is the formula for calculating percent error in chemistry?

If the experimental value is 50 and the theoretical value is 55, what is the percent error?

• 9.09%

• 10%

• 5%

• 11%

Which of the following best describes percent error?

• A measure of how accurate a measurement is compared to the accepted value

• A measure of the precision of a measurement

• A measure of the reliability of a measurement

• A measure of the consistency of a measurement

In an experiment, the theoretical yield of a reaction is 20 grams, but the actual yield is 18 grams. What is the percent error?

• 10%

• 5%

• 15%

• 20%

Why is percent error important in scientific experiments?

• It helps to determine the accuracy of experimental results

• It helps to determine the precision of measurements

• It helps to determine the reliability of instruments

• It helps to determine the consistency of data

A student measures the boiling point of water to be 102°C. If the accepted boiling point is 100°C, what is the percent error?

• 2%

• 1%

• 3%

• 4%

Which of the following scenarios would result in a negative percent error?

• The experimental value is less than the theoretical value

• The experimental value is greater than the theoretical value

• The experimental value is equal to the theoretical value

• The experimental value is twice the theoretical value

If a percent error is calculated to be 0%, what does this indicate about the experimental value?

• It is exactly equal to the theoretical value

• It is greater than the theoretical value

• It is less than the theoretical value

• It is not related to the theoretical value