EBK EXPERIMENTAL ORGANIC CHEMISTRY: A M
6th Edition
ISBN: 9781305687875
Author: Gilbert
Publisher: CENGAGE LEARNING - CONSIGNMENT
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Question
Chapter 3.2, Problem 7E
Interpretation Introduction
Interpretation:Reason for no direct connection of filter flask to water aspirator pump in vacuum filtration should be determined.
Concept introduction:Vacuum filtration is process that is used to separate solids from solvents after recrystallization. Recrystallization is technique that is used for purification of organic compounds. This process includes dissolution of solid in specific solvent at high temperature and then crystals are made again by process of cooling. Temperature of crystals is decreased to allow impurities to remain in solution only.
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Why is it necessary to recrystallize the alum and to perform it in a well ventilated area?
A student doing this experiment had some problems with the procedure, as described below. Explain what effect each problem would have had on the magnitude of the results calculated.
a) The vial containing the Mg tipped over when the student first placed it in the Erlenmeyer flask. The student was able to return it to an upright position almost immediately, and the student continued the experiment.
b) The student neglected to open the pinch clamp on the plastic tubing between the filter flask and the beaker when the Mg came in contact with the HCl solution. After the stopper popped out of the Erlenmeyer flask, the student quickly replaced the stopper, opened the clamp, and proceeded with the experiment.
c) The student began titrating the unreacted HCl with standard NaOH solution and realized that there was a large air bubble in the buret tip. The bubble came out as the first few milliliters of titrant were added.
d) The student forgot to add indicator to the titration mixture until…
A student doing this experiment had some problems with the procedure, as described below. Explain what effect each problem would have had on the magnitude of the results calculated.
b) The student neglected to open the pinch clamp on the plastic tubing between the filter flask and the beaker when the Mg came in contact with the HCl solution. After the stopper popped out of the Erlenmeyer flask, the student quickly replaced the stopper, opened the clamp, and proceeded with the experiment.
c) The student began titrating the unreacted HCl with standard NaOH solution and realized that there was a large air bubble in the buret tip. The bubble came out as the first few milliliters of titrant were added.
d) The student forgot to add indicator to the titration mixture until 12.50 mL of titrant had been added. When the indicator was finally added, the solution was colorless.
Chapter 3 Solutions
EBK EXPERIMENTAL ORGANIC CHEMISTRY: A M
Ch. 3.2 - Prob. 1ECh. 3.2 - Prob. 2ECh. 3.2 - Prob. 3ECh. 3.2 - Prob. 4ECh. 3.2 - Prob. 5ECh. 3.2 - Prob. 6ECh. 3.2 - Prob. 7ECh. 3.2 - Prob. 8ECh. 3.2 - Prob. 9ECh. 3.2 - Prob. 10E
Ch. 3.2 - Prob. 11ECh. 3.2 - Prob. 12ECh. 3.2 - Prob. 13ECh. 3.2 - Prob. 14ECh. 3.2 - Prob. 15ECh. 3.2 - Prob. 16ECh. 3.2 - Prob. 17ECh. 3.2 - Prob. 18ECh. 3.2 - Prob. 19ECh. 3.2 - Prob. 20ECh. 3.2 - Prob. 21ECh. 3.2 - Prob. 22ECh. 3.2 - Prob. 23ECh. 3.2 - Prob. 24ECh. 3.2 - Prob. 25ECh. 3.2 - Prob. 26ECh. 3.2 - Prob. 27ECh. 3.2 - Prob. 28ECh. 3.2 - Prob. 29ECh. 3.2 - Prob. 30ECh. 3.2 - Prob. 31ECh. 3.2 - Prob. 32ECh. 3.2 - Prob. 34ECh. 3.3 - Prob. 1ECh. 3.3 - Prob. 2ECh. 3.3 - Prob. 3ECh. 3.3 - Prob. 4ECh. 3.3 - Prob. 5ECh. 3.3 - Prob. 6ECh. 3.3 - Prob. 7ECh. 3.3 - Prob. 8ECh. 3.3 - Prob. 10ECh. 3.3 - Prob. 11ECh. 3.3 - Prob. 12ECh. 3.3 - Prob. 13ECh. 3.3 - Prob. 14ECh. 3.3 - Prob. 15ECh. 3.3 - Prob. 16ECh. 3.3 - Prob. 17ECh. 3.3 - Prob. 18ECh. 3.3 - Prob. 19ECh. 3.3 - Prob. 21ECh. 3.3 - Prob. 22ECh. 3.3 - Prob. 23ECh. 3.3 - Prob. 24ECh. 3.3 - Prob. 25ECh. 3.3 - Prob. 26E
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