In performing a recrystallization, all of the solid dissolved well before the solvent came to a boil. On cooling to room temperature, no solid preciptitated from the solution. Even chilling in an ice-bath did not produce any crystals. Which of the following would not be reasonable explanations for this situation? O A. Too much solvent was used initially. B. The solid reacted with the solvent to produce a soluble product. C. The solvent did not have a sufficiently high boiling point. O D.- The solid decomposed in the solvent. While performing a distillation to separate two liquids , a small fraction was collected at 70-73°C, then the temperature at the still-head dropped to room-temperature while there was still plenty of liquid in the boiling pot. What option below could not be the explanation? O A. The boiling points of the two liquids are too close together and the still cannot separate them. B. . The first fraction is the lower boiling liquid and the temperature of the pot is not yet high enough to distill the second fraction. C. The power controller for the heating mantel has blown a fuse and stopped heating the mixture. D. The first fraction is completed, but the temperature of the pot must be increased to bring the second fraction to a boil.
In performing a recrystallization, all of the solid dissolved well before the solvent came to a boil. On cooling to room temperature, no solid preciptitated from the solution. Even chilling in an ice-bath did not produce any crystals. Which of the following would not be reasonable explanations for this situation? O A. Too much solvent was used initially. B. The solid reacted with the solvent to produce a soluble product. C. The solvent did not have a sufficiently high boiling point. O D.- The solid decomposed in the solvent. While performing a distillation to separate two liquids , a small fraction was collected at 70-73°C, then the temperature at the still-head dropped to room-temperature while there was still plenty of liquid in the boiling pot. What option below could not be the explanation? O A. The boiling points of the two liquids are too close together and the still cannot separate them. B. . The first fraction is the lower boiling liquid and the temperature of the pot is not yet high enough to distill the second fraction. C. The power controller for the heating mantel has blown a fuse and stopped heating the mixture. D. The first fraction is completed, but the temperature of the pot must be increased to bring the second fraction to a boil.
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...
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Transcribed Image Text:In performing a recrystallization, all of the solid dissolved well before the solvent came to a boil. On cooling to room temperature, no solid preciptitated
from the solution. Even chilling in an ice-bath did not produce any crystals. Which of the following would not be reasonable explanations for this
situation?
O A.
Too much solvent was used initially.
B. The solid reacted with the solvent to produce a soluble product.
C. The solvent did not have a sufficiently high boiling point.
O D.-
The solid decomposed in the solvent.
Transcribed Image Text:While performing a distillation to separate two liquids , a small fraction was collected at 70-73°C, then the temperature at the still-head dropped to
room-temperature while there was still plenty of liquid in the boiling pot. What option below could not be the explanation?
O A.
The boiling points of the two liquids are too close together and the still cannot separate them.
B.
. The first fraction is the lower boiling liquid and the temperature of the pot is not yet high enough to distill the second fraction.
C.
The power controller for the heating mantel has blown a fuse and stopped heating the mixture.
D.
The first fraction is completed, but the temperature of the pot must be increased to bring the second fraction to a boil.
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