4. Make the necessary measurements (in millimeters) and calculate RF for the following chromatogram:Solvent front"Spot"Origin39

Answered: d calculate RF for the foll.

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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4. Make the necessary measurements (in millimeters) and calculate RF for the following chromatogram:
Solvent front
"Spot"
Origin
39

Expert Solution

Step 1

Paper chromatography in analytical chemistry is a technique we have used to identify and separate coloured samples. In paper chromatography, a mixture of substances is located and identified by the flow of a mixture of two solvents that is immiscible or partially miscible on a specially designed Whatman filter paper.
The R_f value (retardation factor) is the ratio of the distance travelled by the solute to the distance travelled by the solvent.

Mathematically, it is expressed as-

$R_{f} = \frac{D i s \tan c e t r a v e l l e d b y s o l u t e}{D i s \tan c e t r a v e l l e d b y s o l v e n t}$

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