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A silica TLC plate is developed in a mixture of solvent system/mobile phase. The solvent travels 30 mm up the plate Analyte #1 travels 9 mm up the plate Analyte #2 travels 16 mm up the plate Which analyte is more polar, and what is its Rf? Analyte #1, Rf = 0.53 Analyte #2, Rf = 0.53 Analyte #2, Rf = 0.3 Analyte #1, Rf = 0.3

A silica TLC plate is developed in a mixture of solvent system/mobile phase. The solvent travels 30 mm up the plate Analyte #1 travels 9 mm up the plate Analyte #2 travels 16 mm up the plate Which analyte is more polar, and what is its Rf? Analyte #1, Rf = 0.53 Analyte #2, Rf = 0.53 Analyte #2, Rf = 0.3 Analyte #1, Rf = 0.3

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
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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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A silica TLC plate is developed in a mixture of solvent system/mobile phase. - The solvent travels 30 mm up the plate. - Analyte #1 travels 9 mm up the plate. - Analyte #2 travels 16 mm up the plate. **Question**: Which analyte is more polar, and what is its Rf? **Options**: - ○ Analyte #1, Rf = 0.53 - ○ Analyte #2, Rf = 0.53 - ○ Analyte #2, Rf = 0.3 - ○ Analyte #1, Rf = 0.3 **Explanation**: The retention factor (Rf) is calculated by dividing the distance traveled by the analyte by the distance traveled by the solvent. Analyte #1 is more polar if it travels less distance since polar compounds tend to have lower Rf values on a polar stationary phase like silica gel. For Analyte #1: - Rf = 9 mm / 30 mm = 0.3 For Analyte #2: - Rf = 16 mm / 30 mm = 0.53 Thus, Analyte #1 is more polar, with an Rf of 0.3.
Transcribed Image Text:A silica TLC plate is developed in a mixture of solvent system/mobile phase. - The solvent travels 30 mm up the plate. - Analyte #1 travels 9 mm up the plate. - Analyte #2 travels 16 mm up the plate. **Question**: Which analyte is more polar, and what is its Rf? **Options**: - ○ Analyte #1, Rf = 0.53 - ○ Analyte #2, Rf = 0.53 - ○ Analyte #2, Rf = 0.3 - ○ Analyte #1, Rf = 0.3 **Explanation**: The retention factor (Rf) is calculated by dividing the distance traveled by the analyte by the distance traveled by the solvent. Analyte #1 is more polar if it travels less distance since polar compounds tend to have lower Rf values on a polar stationary phase like silica gel. For Analyte #1: - Rf = 9 mm / 30 mm = 0.3 For Analyte #2: - Rf = 16 mm / 30 mm = 0.53 Thus, Analyte #1 is more polar, with an Rf of 0.3.
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