Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter15: Acid–base Equilibria
Section: Chapter Questions
Problem 57P
Related questions
Question
![8:34
ul LTE O
1 Files
This account does not allow editing on your
Sign in
device. For an account with full acces...more
solutions), and pink at pH values above 9 (i.e. basic solutions). We expect that the endpoint is very close
to the equivalence point, so we treat it as the equivalence point in our calculations.
Page | 1
Lab 14: Acid-Base Titration
Oxnard College
Video of the endpoint in a phenolphthalein acid-base titration:
https://youtu.be/ukSR 2D 7Ug
In acidic solution
In basic solution
equivalence point
Pre-Lab Assignment
For questions 1-4 below, 20.0 mL of a hydrofluoric acid (HF) of unknown concentration
0.121 M potassium hydroxide (KOH).
titrated with
1. In the diagram below, mark where the HF, the KOH, and the indicator would be found.
2. Write a balanced chemical equation to show the neutralization of HF with KOH. (Include phases.)
3. What color is phenolphthalein in acidic solutions?
What color is phenolphthalein in basic solutions?
What color is phenolphthalein before the titration in #1?
What color
phenolphthalein at the endpoint in #1?
4. If the endpoint of the titration is reached after the addition of 13.42 mL of 0.121 M KOH, what is the
concentration of the original 20.00 mL HF solution? (Show work!)
Page | 2
Lab 14: Acid-Base Titration
Oxnard College
Procedure
Part 1. Preparation and Standardization of a NaOH solution.
1. Navigate to the following video that describes how to set up a burette.
https://youtu.be/P9mj0INwfwY](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F50ac87a2-3dea-40dd-9a88-5460e40527f7%2Fa790e352-991e-4546-9513-c4d9c1c245e8%2Fh5brsxc_processed.jpeg&w=3840&q=75)
Transcribed Image Text:8:34
ul LTE O
1 Files
This account does not allow editing on your
Sign in
device. For an account with full acces...more
solutions), and pink at pH values above 9 (i.e. basic solutions). We expect that the endpoint is very close
to the equivalence point, so we treat it as the equivalence point in our calculations.
Page | 1
Lab 14: Acid-Base Titration
Oxnard College
Video of the endpoint in a phenolphthalein acid-base titration:
https://youtu.be/ukSR 2D 7Ug
In acidic solution
In basic solution
equivalence point
Pre-Lab Assignment
For questions 1-4 below, 20.0 mL of a hydrofluoric acid (HF) of unknown concentration
0.121 M potassium hydroxide (KOH).
titrated with
1. In the diagram below, mark where the HF, the KOH, and the indicator would be found.
2. Write a balanced chemical equation to show the neutralization of HF with KOH. (Include phases.)
3. What color is phenolphthalein in acidic solutions?
What color is phenolphthalein in basic solutions?
What color is phenolphthalein before the titration in #1?
What color
phenolphthalein at the endpoint in #1?
4. If the endpoint of the titration is reached after the addition of 13.42 mL of 0.121 M KOH, what is the
concentration of the original 20.00 mL HF solution? (Show work!)
Page | 2
Lab 14: Acid-Base Titration
Oxnard College
Procedure
Part 1. Preparation and Standardization of a NaOH solution.
1. Navigate to the following video that describes how to set up a burette.
https://youtu.be/P9mj0INwfwY
![8:34
ul LTE C
1 Files
Lab+14+Acid-Base+Titration
This account does not allow editing on your
(x)
Sign in
device. For an account with full acces...more
Lab 14: Acid-Base Titration
Oxnard College
Data Analysis:
Part 1. Standardization of NaOH Solution
1. After you have coated the inside of the burette with a few milliliters of the titrant, what should you do
with those few milliliters of the titrant?
2. Is the stopcock perpendicular to or parallel to the burette barrel when it is closed?
3. To what place should a burette be read? (i.e. ones place, tenths place, hundredths place)
4. Complete Data Table 1. The neutralization reaction between KHP and NaOH is:
Data Table 1a. Standardization of NaOH solution
Trial 1
Trial 2
Trial 3
Volume of 0.500 M
КНР, mL
Burette reading
before titration, mL
Burette reading after
titration, mL
Volume of NaOH
solution added, mL
Data Table 1b.
Mole of KHP
Concentration of
NaOH, M
Average NaOH
concentration, M
Show work for Data Table 1a below. Work for Data Table 1b shown in Post-Lab Questions
Pag
Lab 14: Acid-Base Titration
Oxnard College
Post-Laboratory Questions
1. Calculate the number of moles of KHP present in the flask before the titration.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F50ac87a2-3dea-40dd-9a88-5460e40527f7%2Fa790e352-991e-4546-9513-c4d9c1c245e8%2Frgfapq4_processed.jpeg&w=3840&q=75)
Transcribed Image Text:8:34
ul LTE C
1 Files
Lab+14+Acid-Base+Titration
This account does not allow editing on your
(x)
Sign in
device. For an account with full acces...more
Lab 14: Acid-Base Titration
Oxnard College
Data Analysis:
Part 1. Standardization of NaOH Solution
1. After you have coated the inside of the burette with a few milliliters of the titrant, what should you do
with those few milliliters of the titrant?
2. Is the stopcock perpendicular to or parallel to the burette barrel when it is closed?
3. To what place should a burette be read? (i.e. ones place, tenths place, hundredths place)
4. Complete Data Table 1. The neutralization reaction between KHP and NaOH is:
Data Table 1a. Standardization of NaOH solution
Trial 1
Trial 2
Trial 3
Volume of 0.500 M
КНР, mL
Burette reading
before titration, mL
Burette reading after
titration, mL
Volume of NaOH
solution added, mL
Data Table 1b.
Mole of KHP
Concentration of
NaOH, M
Average NaOH
concentration, M
Show work for Data Table 1a below. Work for Data Table 1b shown in Post-Lab Questions
Pag
Lab 14: Acid-Base Titration
Oxnard College
Post-Laboratory Questions
1. Calculate the number of moles of KHP present in the flask before the titration.
Expert Solution
![](/static/compass_v2/shared-icons/check-mark.png)
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 2 steps with 1 images
![Blurred answer](/static/compass_v2/solution-images/blurred-answer.jpg)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Recommended textbooks for you
![Principles of Modern Chemistry](https://www.bartleby.com/isbn_cover_images/9781305079113/9781305079113_smallCoverImage.gif)
Principles of Modern Chemistry
Chemistry
ISBN:
9781305079113
Author:
David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:
Cengage Learning
![Chemistry](https://www.bartleby.com/isbn_cover_images/9781305957404/9781305957404_smallCoverImage.gif)
Chemistry
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning
![Chemistry: An Atoms First Approach](https://www.bartleby.com/isbn_cover_images/9781305079243/9781305079243_smallCoverImage.gif)
Chemistry: An Atoms First Approach
Chemistry
ISBN:
9781305079243
Author:
Steven S. Zumdahl, Susan A. Zumdahl
Publisher:
Cengage Learning
![Principles of Modern Chemistry](https://www.bartleby.com/isbn_cover_images/9781305079113/9781305079113_smallCoverImage.gif)
Principles of Modern Chemistry
Chemistry
ISBN:
9781305079113
Author:
David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:
Cengage Learning
![Chemistry](https://www.bartleby.com/isbn_cover_images/9781305957404/9781305957404_smallCoverImage.gif)
Chemistry
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning
![Chemistry: An Atoms First Approach](https://www.bartleby.com/isbn_cover_images/9781305079243/9781305079243_smallCoverImage.gif)
Chemistry: An Atoms First Approach
Chemistry
ISBN:
9781305079243
Author:
Steven S. Zumdahl, Susan A. Zumdahl
Publisher:
Cengage Learning
![Chemistry](https://www.bartleby.com/isbn_cover_images/9781133611097/9781133611097_smallCoverImage.gif)
![Chemistry: Principles and Practice](https://www.bartleby.com/isbn_cover_images/9780534420123/9780534420123_smallCoverImage.gif)
Chemistry: Principles and Practice
Chemistry
ISBN:
9780534420123
Author:
Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:
Cengage Learning