Question

(15) Calculate the Rf value for the Aspirin which has following information: Distance travelled by the solvent front = 11.8 mm and distance travelled by aspirin is 5.9mm.

Answer 1

We can calculate R_{​​​​​​f} value by using the following formula

R_{​​​​​​f} = D_{​​​​​​s}​​​​​/D_f i.e R_​f is the distance travelled by the compound divided by the distance travelled by the solvent.

Where, D_{​​​​​​s} is the distance travelled by compound or solution.

D_{​​​​​​f} is the distance travelled by solvent factor

Here D_{​​​​​​f} = 11.8 and D_{​​​​​​s} = 5.9

therefore, R_{​​​​​​f} = 5.9/11.8

therefore R_{​​​​​​f} = 0.5