Question

What is the Rf value of a pigment if the distance it traveled was 1cm and the mobile phase was 4cm?

A) 0.25
B) 0.50
C) 0.75
D) 1.00

Answer 1

The Rf value of a pigment can be calculated by dividing the distance it traveled by the distance the mobile phase traveled. In this case, the Rf value is 0.25.

Step-by-step explanation:

The Rf value, or retention factor value, is a concept used in chromatography to determine the relative migration of a compound compared to the mobile phase. It is calculated by dividing the distance the compound traveled by the distance the mobile phase traveled. In this case, if the distance traveled by the pigment is 1cm and the distance traveled by the mobile phase is 4cm, the Rf value can be calculated as follows:

Rf value = distance traveled by the pigment / distance traveled by the mobile phase

Rf value = 1 cm / 4 cm = 0.25

Therefore, the correct answer is A) 0.25.