BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

Solutions

Chapter
Section
BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

The accepted value of the melting point of pureaspirin is 135 °C. Trying to verify that value, you obtain 134 °C, 136°C133 °C, and 138 °C infour separate trials. Your partner finds 138 °C,137 °C, 138 °C, and 138 °C.

  1. (a) Calculate the average value and percent error for your data and your partner's data.
  2. (b) Which of you is more precise? More accurate?

(a)

Interpretation Introduction

Interpretation: The average and percent error in each case has to be calculated.

Concept introduction:

Precision: Is a measurement indicates how well several determination of the same quantity agree.

Accuracy: Is the agreement of a measurement with the accepted value of the quantity.

Percent error: The difference between measured result and the accepted value.

  Percenterror=ErrorinmeasurementAcceptedvalue×100%

  Error in measurement = Experimentally determined value - Accepted value.

Explanation

The average density and percent error is calculated as,

Average density Value for Method A and B:

Average density for Method 1: 134+ 136 + 133 + 1384                                   = 135.25C.Average density for Method 2: 138+ 137 + 138 + 1384                                   = 137.75C

Hence, the average for method 1 and 2 are obtained as shown above.

Percent error for Method A and B:

Errorinmeasurement =135.25C - 135CPercenterrorformethod1=135

(b)

Interpretation Introduction

Interpretation: The method that is more precise and accurate has to be given.

Concept introduction:

Precision: Is a measurement indicates how well several determination of the same quantity agree.

Accuracy: Is the agreement of a measurement with the accepted value of the quantity.

Percent error: The difference between measured result and the accepted value.

  Percenterror=ErrorinmeasurementAcceptedvalue×100%

  Error in measurement = Experimentally determined value - Accepted value.

Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Additional Science Solutions

Find more solutions based on key concepts

Show solutions add

A vegetarian diet planner should be sure to include sources of a. a carbohydrate. b. vitamin C. c. vitamin B12....

Nutrition: Concepts and Controversies - Standalone book (MindTap Course List)

How could you detect Earths precession t examining star chats from ancient Egypt?

Horizons: Exploring the Universe (MindTap Course List)

A commuter train travels between two downtown stations. Because the stations are only 1.00 km apart, the train ...

Physics for Scientists and Engineers, Technology Update (No access codes included)