Question

Let the retention factor of species A be 0.5, while the retention factor of species B be 0.3. If species A moves 1.0 cm how far does species B move

Answer 1

Answer:

The correct answer is - 1.2 cm.

Explanation:

The retention factor is represented by Rf.

Given:

Rf of species A is = 0.5

Rf of species B is = 0.6

Formula:

Rf = distance the compound moves/distance the solvent moves

Rf(A)/Rf(B) = $\frac{distance moved by A/distance moved by solvent}{distance moved by B/distance moved by solvent}$

Rf(A)/Rf(B) = distance moved by A/distance moved by B

0.5/0.6 = 1/distance moved by B

distance moved by B = 0.5/0.6

= 1.2 cm