Prelaboratory Questions Name Laboratory Section 1. Read the Introduction and Procedure for this experiment, then answer the following ques- tions about preparing a TLC plate. a) Why must you hold the plate only by its edges? b) Why must you use a pencil and not a pen to draw the starting line that is 14 – ½ inch from the bottom end of the plate? c) Why must the starting pencil line be above the level of the solvent on the chamber? d) Why must the sample spot not be too concentrated?
Prelaboratory Questions Name Laboratory Section 1. Read the Introduction and Procedure for this experiment, then answer the following ques- tions about preparing a TLC plate. a) Why must you hold the plate only by its edges? b) Why must you use a pencil and not a pen to draw the starting line that is 14 – ½ inch from the bottom end of the plate? c) Why must the starting pencil line be above the level of the solvent on the chamber? d) Why must the sample spot not be too concentrated?
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
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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:Prelaboratory Questions
Name
Laboratory Section
1. Read the Introduction and Procedure for this experiment, then answer the following ques-
tions about preparing a TLC plate.
a) Why must you hold the plate only by its edges?
b) Why must you use a pencil and not a pen to draw the starting line that is 14 – ½ inch
from the bottom end of the plate?
c) Why must the starting pencil line be above the level of the solvent on the chamber?
d) Why must the sample spot not be too concentrated?
(continued on next pa
Expert Solution
Step 1
The principle of TLC is
adsorption at stationary phase--> desorption af --> dissolve--> movment with solvent.--> adsorbed.
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