Homework Help is Here – Start Your Trial Now!
Science
Chemistry
Precipitating and Drying Cool the "HCI Extract" and the "Hydroxide Extract" in an ice-water bath. Neutralize the "HCI Extract" with 6 M sodium hydroxide and add a little excess base to make the solution distinctly basic to pHydrion paper. Neutral- ize the "Hydroxide Extract" with 6 M hydrochloric acid and add a little excess acid to make the solution distinctly acidic to pHydrion paper.* Upon neutralization, a precipitate should form in each flask. Collect the precipitate in the flasks labeled "HCI Extract" and "Hydroxide Extract" by vacuum filtration (Fig. 2.54) using a Büchner or Hirsch funnel. Wash each solid on the filter paper with a small portion of cold water. Transfer each solid to a labeled watchglass, cover it with a piece of filter or weighing paper, and allow the product to air-dry until the next laboratory period. Alternatively, dry the solid in an oven having a temperature of 90-100 °C for about 1 h. After drying, transfer the 4-nitroaniline and the benzoic acid each to a different dry, tared vial. Separate the "Neutral Compound" from the drying agent by decantation (Fig. 2.56) or gravity filtration through a cotton plug (Fig. 5.5) into a 100-mL round- bottom flask. Remove the solvent by simple distillation (Fig. 2.37). Alternatively, use rotary evaporation or one of the other techniques described in Section 2.29. Allow the residue to cool to room temperature to solidify, scrape the contents of the flask onto a piece of weighing paper to air-dry, and then transfer it to a dry, tared vial.

Precipitating and Drying Cool the "HCI Extract" and the "Hydroxide Extract" in an ice-water bath. Neutralize the "HCI Extract" with 6 M sodium hydroxide and add a little excess base to make the solution distinctly basic to pHydrion paper. Neutral- ize the "Hydroxide Extract" with 6 M hydrochloric acid and add a little excess acid to make the solution distinctly acidic to pHydrion paper.* Upon neutralization, a precipitate should form in each flask. Collect the precipitate in the flasks labeled "HCI Extract" and "Hydroxide Extract" by vacuum filtration (Fig. 2.54) using a Büchner or Hirsch funnel. Wash each solid on the filter paper with a small portion of cold water. Transfer each solid to a labeled watchglass, cover it with a piece of filter or weighing paper, and allow the product to air-dry until the next laboratory period. Alternatively, dry the solid in an oven having a temperature of 90-100 °C for about 1 h. After drying, transfer the 4-nitroaniline and the benzoic acid each to a different dry, tared vial. Separate the "Neutral Compound" from the drying agent by decantation (Fig. 2.56) or gravity filtration through a cotton plug (Fig. 5.5) into a 100-mL round- bottom flask. Remove the solvent by simple distillation (Fig. 2.37). Alternatively, use rotary evaporation or one of the other techniques described in Section 2.29. Allow the residue to cool to room temperature to solidify, scrape the contents of the flask onto a piece of weighing paper to air-dry, and then transfer it to a dry, tared vial.

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
Write all the chemical equations that occur in this procedure. See image below
Extraction Extract the organic solution three times using 15-mL portions of 3 M hydrochloric acid. Be sure to hold both the stopcock and the stopper of the fun- nel tightly and frequently vent the funnel by opening its stopcock (Fig. 2.61). Identify the aqueous layer by the method described in Section 2.21. Combine the three acidic aqueous layers from the extractions in an Erlenmeyer flask la- beled "HCI Extract." Return the organic layer to the separatory funnel and extract it two times using 15-mL portions of 3 M sodium hydroxide solution. Combine these two aqueous layers in a second flask labeled "Hydroxide Extract." Transfer the organic solution into a clean Erlenmeyer flask containing two spatula-tips full of anhydrous sodium sulfate and labeled "Neutral Compound." Let this solution
Transcribed Image Text:Extraction Extract the organic solution three times using 15-mL portions of 3 M hydrochloric acid. Be sure to hold both the stopcock and the stopper of the fun- nel tightly and frequently vent the funnel by opening its stopcock (Fig. 2.61). Identify the aqueous layer by the method described in Section 2.21. Combine the three acidic aqueous layers from the extractions in an Erlenmeyer flask la- beled "HCI Extract." Return the organic layer to the separatory funnel and extract it two times using 15-mL portions of 3 M sodium hydroxide solution. Combine these two aqueous layers in a second flask labeled "Hydroxide Extract." Transfer the organic solution into a clean Erlenmeyer flask containing two spatula-tips full of anhydrous sodium sulfate and labeled "Neutral Compound." Let this solution
Precipitating and Drying Cool the "HCI Extract" and the "Hydroxide Extract" in an ice-water bath. Neutralize the "HCI Extract" with 6 M sodium hydroxide and add a little excess base to make the solution distinctly basic to pHydrion paper. Neutral- ize the "Hydroxide Extract" with 6 M hydrochloric acid and add a little excess acid to make the solution distinctly acidic to pHydrion paper.* Upon neutralization, a precipitate should form in each flask. Collect the precipitate in the flasks labeled "HCI Extract" and "Hydroxide Extract" by vacuum filtration (Fig. 2.54) using a Büchner or Hirsch funnel. Wash each solid on the filter paper with a small portion of cold water. Transfer each solid to a labeled watchglass, cover it with a piece of filter or weighing paper, and allow the product to air-dry until the next laboratory period. Alternatively, dry the solid in an oven having a temperature of 90-100 °C for about 1 h. After drying, transfer the 4-nitroaniline and the benzoic acid each to a different dry, tared vial. Separate the "Neutral Compound" from the drying agent by decantation (Fig. 2.56) or gravity filtration through a cotton plug (Fig. 5.5) into a 100-mL round- bottom flask. Remove the solvent by simple distillation (Fig. 2.37). Alternatively, use rotary evaporation or one of the other techniques described in Section 2.29. Allow the residue to cool to room temperature to solidify, scrape the contents of the flask onto a piece of weighing paper to air-dry, and then transfer it to a dry, tared vial.
Transcribed Image Text:Precipitating and Drying Cool the "HCI Extract" and the "Hydroxide Extract" in an ice-water bath. Neutralize the "HCI Extract" with 6 M sodium hydroxide and add a little excess base to make the solution distinctly basic to pHydrion paper. Neutral- ize the "Hydroxide Extract" with 6 M hydrochloric acid and add a little excess acid to make the solution distinctly acidic to pHydrion paper.* Upon neutralization, a precipitate should form in each flask. Collect the precipitate in the flasks labeled "HCI Extract" and "Hydroxide Extract" by vacuum filtration (Fig. 2.54) using a Büchner or Hirsch funnel. Wash each solid on the filter paper with a small portion of cold water. Transfer each solid to a labeled watchglass, cover it with a piece of filter or weighing paper, and allow the product to air-dry until the next laboratory period. Alternatively, dry the solid in an oven having a temperature of 90-100 °C for about 1 h. After drying, transfer the 4-nitroaniline and the benzoic acid each to a different dry, tared vial. Separate the "Neutral Compound" from the drying agent by decantation (Fig. 2.56) or gravity filtration through a cotton plug (Fig. 5.5) into a 100-mL round- bottom flask. Remove the solvent by simple distillation (Fig. 2.37). Alternatively, use rotary evaporation or one of the other techniques described in Section 2.29. Allow the residue to cool to room temperature to solidify, scrape the contents of the flask onto a piece of weighing paper to air-dry, and then transfer it to a dry, tared vial.
Expert Solution
steps

Step by step

Solved in 3 steps

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Basics of Titrimetric Analysis
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