Homework Help is Here – Start Your Trial Now!
Science
Chemistry
a. Sodium hydroxide and ethanol are added to 2-naphthol and then refluxed for thirty minutes before the addition of 1-bromobutane. Why is it important to allow this mixture to reflux before the addition of 1-bromobutane? b. Will sodium hydroxide or ethanol react most with 2-naphthol? Explain why one substance will react more with 2-naphthol than the other.

a. Sodium hydroxide and ethanol are added to 2-naphthol and then refluxed for thirty minutes before the addition of 1-bromobutane. Why is it important to allow this mixture to reflux before the addition of 1-bromobutane? b. Will sodium hydroxide or ethanol react most with 2-naphthol? Explain why one substance will react more with 2-naphthol than the other.

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
See similar textbooks
icon
Related questions
Question

a. Sodium hydroxide and ethanol are added to 2-naphthol and then refluxed for thirty minutes before the addition of 1-bromobutane. Why is it important to allow this mixture to reflux before the addition of 1-bromobutane?

b. Will sodium hydroxide or ethanol react most with 2-naphthol? Explain why one substance will react more with 2-naphthol than the other. 

9. After 30 minutes of refluxing, remove the heat source and allow it to cool for 1 minute. 10. Under the fumehood, carefully pour the contents of the flask onto 25 g of ice chips in a 250 mL beaker, allowing them to mix. Place the beaker containing the sample and 25g of ice on ice for an additional 10-15 minutes, letting it cool under the fumehood. 11. Remove the magnetic bar and wash it. 12. Using the water that has been cooling, rinse the round bottom flask with a sufficient amount and add to the beaker containing the ice and your product. Swirl the contents of the beaker until all ice is melted. 13. Carefully collect the product by vacuum filtration. Avoid putting too much volume in the Buchner funnel at one time. 14. Wash the product with ice-cold water (~30 mL). It is very important that water be ice cold. 15. Draw air through the product for 5 minutes. Allow your product to dry over the next week.
Transcribed Image Text:9. After 30 minutes of refluxing, remove the heat source and allow it to cool for 1 minute. 10. Under the fumehood, carefully pour the contents of the flask onto 25 g of ice chips in a 250 mL beaker, allowing them to mix. Place the beaker containing the sample and 25g of ice on ice for an additional 10-15 minutes, letting it cool under the fumehood. 11. Remove the magnetic bar and wash it. 12. Using the water that has been cooling, rinse the round bottom flask with a sufficient amount and add to the beaker containing the ice and your product. Swirl the contents of the beaker until all ice is melted. 13. Carefully collect the product by vacuum filtration. Avoid putting too much volume in the Buchner funnel at one time. 14. Wash the product with ice-cold water (~30 mL). It is very important that water be ice cold. 15. Draw air through the product for 5 minutes. Allow your product to dry over the next week.
Procedure: 1. Collect a small sample of 2-naphthol in a capillary tube. Label and store it for experiment 4. Reweigh the leftover 2-naphthol; use this mass in your calculations for this lab. 2. Set up reflux apparatus. 3. To a flat-bottomed round bottom flask, add ~0.56 g (14.0 mmol) of NaOH (about 5 pellets) and the 2- naphthol through a powder funnel. Note: If you have less than 0.5 g of 2 naphthol extracted, see one of the TAs. Do not use more than 1.0g of 2-naphthol. If you have more than 1.0g, set the excess quantity aside. 4. Add 20 mL of ethanol (EtOH) and a magnetic stir bar to the flask. 5. Reflux the solution for 30 minutes or until all the solids have dissolved. Reflux heat should be adjusted so there is a 1 drop/second rate from the condenser. Reflux should be conducted on a hot plate with magnetic stirring: the hot plate can be set at 345 with the rpm at 800. Note: The round bottom flask should be placed as close as possible to the hot plate but the two should NOT make contact. 6. Once all solids have dissolved, remove the heat source and allow the solution to cool slightly. Remove the reflux condenser (make sure the solution has stopped boiling BEFORE you remove the condenser) and add 1.0 mL of 1-bromobutane (8.8 mmol) to the flask. 7. Replace the condenser and reflux for an additional 30 minutes 8. While the solution is refluxing, prepare the following: a. Vacuum filtration apparatus with a Buchner Funnel b. Place 100 mL of water in an ice bath for later use. c. Obtain the masses of recrystallized benzoic acid and 1,4 dimethoxybenzene d. Right before the reflux is about to end, place 25 g of ice in a 250 mL beaker.
Transcribed Image Text:Procedure: 1. Collect a small sample of 2-naphthol in a capillary tube. Label and store it for experiment 4. Reweigh the leftover 2-naphthol; use this mass in your calculations for this lab. 2. Set up reflux apparatus. 3. To a flat-bottomed round bottom flask, add ~0.56 g (14.0 mmol) of NaOH (about 5 pellets) and the 2- naphthol through a powder funnel. Note: If you have less than 0.5 g of 2 naphthol extracted, see one of the TAs. Do not use more than 1.0g of 2-naphthol. If you have more than 1.0g, set the excess quantity aside. 4. Add 20 mL of ethanol (EtOH) and a magnetic stir bar to the flask. 5. Reflux the solution for 30 minutes or until all the solids have dissolved. Reflux heat should be adjusted so there is a 1 drop/second rate from the condenser. Reflux should be conducted on a hot plate with magnetic stirring: the hot plate can be set at 345 with the rpm at 800. Note: The round bottom flask should be placed as close as possible to the hot plate but the two should NOT make contact. 6. Once all solids have dissolved, remove the heat source and allow the solution to cool slightly. Remove the reflux condenser (make sure the solution has stopped boiling BEFORE you remove the condenser) and add 1.0 mL of 1-bromobutane (8.8 mmol) to the flask. 7. Replace the condenser and reflux for an additional 30 minutes 8. While the solution is refluxing, prepare the following: a. Vacuum filtration apparatus with a Buchner Funnel b. Place 100 mL of water in an ice bath for later use. c. Obtain the masses of recrystallized benzoic acid and 1,4 dimethoxybenzene d. Right before the reflux is about to end, place 25 g of ice in a 250 mL beaker.
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps with 2 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Micelles and Biological Membranes
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.
Similar questions
Recommended textbooks for you
Chemistry
Chemistry
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning
Chemistry
Chemistry
Chemistry
ISBN:
9781259911156
Author:
Raymond Chang Dr., Jason Overby Professor
Publisher:
McGraw-Hill Education
Principles of Instrumental Analysis
Principles of Instrumental Analysis
Chemistry
ISBN:
9781305577213
Author:
Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:
Cengage Learning
Organic Chemistry
Organic Chemistry
Chemistry
ISBN:
9780078021558
Author:
Janice Gorzynski Smith Dr.
Publisher:
McGraw-Hill Education
Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
Chemistry
ISBN:
9781305079373
Author:
William L. Masterton, Cecile N. Hurley
Publisher:
Cengage Learning
Elementary Principles of Chemical Processes, Bind…
Elementary Principles of Chemical Processes, Bind…
Chemistry
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY
SEE MORE TEXTBOOKS