EBK EXPERIMENTAL ORGANIC CHEMISTRY: A M
6th Edition
ISBN: 9781305687875
Author: Gilbert
Publisher: CENGAGE LEARNING - CONSIGNMENT
expand_more
expand_more
format_list_bulleted
Question
Chapter 4.2, Problem 9E
a)
Interpretation Introduction
Interpretation: Effect of removal of solvent at temperatures below their normal points with help of rotary evaporator should be determined.
Concept introduction: Rotary evaporator is laboratory apparatus that is used to remove solvents with help of reduced pressure. This is designed in such way that allows fast evaporation of solvents. A variable-speed motor is used for rotation of flask that has solvent to be evaporated.
b)
Interpretation Introduction
Interpretation: Preference of rotary evaporation distillation over simple distillation should be determined.
Concept introduction: Rotary evaporator is laboratory apparatus that is used to remove solvents with help of reduced pressure. This is designed in such way that allows fast evaporation of solvents. A variable-speed motor is used for rotation of flask that has solvent to be evaporated.
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
What is the purpose of the laboratory exercise about simple distillation and fractional distillation
It is said that the surface area of the boiling liquid should be kept as large as possible. However, why is it that too large of a distilling flask should also be avoided?
1. Aspirin could be recrystallized by dissolving in ethanol and adding water. Explain the logic for this procedure.
Chapter 4 Solutions
EBK EXPERIMENTAL ORGANIC CHEMISTRY: A M
Ch. 4.2 - Prob. 1ECh. 4.2 - Prob. 2ECh. 4.2 - Prob. 3ECh. 4.2 - Prob. 4ECh. 4.2 - Prob. 5ECh. 4.2 - Prob. 6ECh. 4.2 - Prob. 7ECh. 4.2 - Prob. 8ECh. 4.2 - Prob. 9ECh. 4.3 - Prob. 1E
Ch. 4.3 - Prob. 2ECh. 4.3 - Prob. 3ECh. 4.3 - Prob. 4ECh. 4.3 - Prob. 5ECh. 4.3 - Prob. 6ECh. 4.3 - Prob. 7ECh. 4.3 - Prob. 8ECh. 4.4 - Prob. 1ECh. 4.4 - Prob. 2ECh. 4.4 - Prob. 3ECh. 4.4 - Prob. 4ECh. 4.4 - Prob. 5ECh. 4.4 - Prob. 6ECh. 4.4 - Prob. 7ECh. 4.4 - Prob. 8ECh. 4.4 - Prob. 9ECh. 4.4 - Prob. 11ECh. 4.4 - Prob. 12ECh. 4.4 - Prob. 13ECh. 4.4 - Prob. 14ECh. 4.6 - Prob. 1ECh. 4.6 - Prob. 2ECh. 4.6 - Prob. 3ECh. 4.6 - Prob. 4ECh. 4.6 - Prob. 5ECh. 4.6 - Prob. 6ECh. 4.6 - Prob. 7ECh. 4.6 - Prob. 8ECh. 4.6 - Prob. 9E
Knowledge Booster
Similar questions
- Please help, Long and clear answers.arrow_forward3. Describe how to maintain a supply of clean droppers available for use in the experiment. 4. How many spotting capillaries do you prepare for use in Part A?arrow_forward2. An impure sample of compound D is contaminated with a number of impurities. The sample is to be purified by recrystallization. The solubility properties of three potential solvents are summarized below. Choose the best solvent and explain your answer. Include comments on each of the three solvents. Solubility of D at the boiling point Solubility of D at - 0°C of the solvent Solvent X 0.08g/mL 0.06 g/mL Solvent Y 0.67 g/mL 0.59 g/mL Solvent Z 0.63 g/mL 0.12 g/mLarrow_forward
- 6. In a recrystallization, why is it important to dissolve the solute in boiling solvent instead of cold solvent? a. To melt the solute b. To boil the solute c. To use as small amount of solvent to dissolve the solute as possible d. To chemically decompose the impuritiesarrow_forwardis a method of purifying a compound by removing any impurities that might be mixed with it. It is often used as a final clean-up step, after other methods that are effective at removing larger amounts of 31. impurities, but that do not raise the purity of the final compound to a sufficiently high level. * Sublimation Recrystallization O Decolorizationarrow_forwardplease answer all :(arrow_forward
- What is the main information you wish to acquire when performing a melting point analysis? A) the percentage of impurities in your sample B) the average size of crystals after the crystallization process C) how much reagent has successfully turned into product D) whether the conversion from reagent to product was successfularrow_forward………… is usually used only to separate liquids whose boiling points differ greatly or to separate liquids from involatile solids or oils. which option is correct?a. distillation b. simple distillation c. fractional distillationd. steam distillation e. vacuum distillationarrow_forward8. Organic solids are best purified by a. recrystallization b. vacuum distillation c. fractional distillation d. simple distillationarrow_forward
- ......arrow_forward2. When preparing a non-aqueous alcoholic solution that is required to be free of water:a. What solvent is suitable for calibrating the bottle it is prepared or dispensed in?b. What solvent should not be used for calibration?arrow_forward1. A 0.10 M HNO3 solution will be prepared from concentrated HNO3. a. Using the method outlined in Experiment 5, determine the concentration of a stock bottle of concentrated nitric acid. [density = 1.42 g/mL; 70% by mass HNO3] b. Calculate the volume of concentrated NO3 needed to prepare 500 mL of a 0.10 %3D M solution.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Macroscale and Microscale Organic ExperimentsChemistryISBN:9781305577190Author:Kenneth L. Williamson, Katherine M. MastersPublisher:Brooks Cole
Chemical Principles in the LaboratoryChemistryISBN:9781305264434Author:Emil Slowinski, Wayne C. Wolsey, Robert RossiPublisher:Brooks Cole
Chemistry: Principles and PracticeChemistryISBN:9780534420123Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward MercerPublisher:Cengage Learning
Macroscale and Microscale Organic Experiments
Chemistry
ISBN:9781305577190
Author:Kenneth L. Williamson, Katherine M. Masters
Publisher:Brooks Cole
Chemical Principles in the Laboratory
Chemistry
ISBN:9781305264434
Author:Emil Slowinski, Wayne C. Wolsey, Robert Rossi
Publisher:Brooks Cole
Chemistry: Principles and Practice
Chemistry
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Cengage Learning