Question

The following data is collected after eluting a TLC plate containing three sample spots (A, B, and C): distance traveled by compound A = 32 mm, distance traveled by compound B = 48 mm, distance traveled by compound C = 18 mm, distance traveled by solvent front = 64 mm and length of the TLC plate = 70 mm. What is the Rf value of compound C? Enter your answer using the proper number of significant figures.

Answer 1

Rf = 0.26

Step-by-step explanation:

The Rf value is calculated by dividing the distance traveled by a compound, by the distance traveled by the solvent front. In other words, the length of the TLC plate is not relevant in calculating a Rf value.

• Distance traveled by compound C = 18 mm

• Distance traveled by the solvent front = 70 mm

• Rf = 18/70 = 0.26