Question

Following chromatogram was developed by adsorption of compound 'A' on a 6 cm TLC glass plate. Retardation factor of the compound 'A' is_____ \(\times 10^{–1}\).

Hint:

For R_f calculations:
• Measure the distances accurately for the solute and solvent front.
• Ensure the units for both distances are consistent.
• Multiply the calculated R_f value by 10⁻¹ if required.

Answer 1

Correct Answer: 0.6

1. Retardation Factor (\(R_f\)):
The \(R_f\) value is defined as:
\[R_f = \frac{\text{Distance traveled by the solute (A)}}{\text{Distance traveled by the solvent front}}.\]
2. Given Data:
    Total length of the TLC plate = 6 cm.
    Let the solute travel 3.6 cm and the solvent front travel 6 cm.
3. Calculate \(R_f\):
\[R_f = \frac{3.6}{6} = 0.6.\]
4.Convert to \(10^{-1}\) Factor:
\[R_f \times 10^{-1} = 6 \times 10^{-1}.\]
Final Answer: \(0.6\).