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calculate the rf value for a spot in a chromatography experiment if the solvent moved 14.2 cm and the spot moved 9.9 cm from the origin.

Sagot :

Rf will be 0.697

Retention factor can be defined as;

The ratio of  distance travelled by substance to the distance travelled by solvent. Substances start at the origin. The starting point of the compound is called the origin. This is where we measure the distance moved by the substance.

According to the question;

The given data is:

spot distance  =   9.9 cm

solvent distance =  14.2 cm

We will have to find the retention factor value:

Rf = ?

The formula to find Rf is as follows;

Rf = spot distance / solvent distance

Rf = 9.9 cm / 14.2 cm

The answer after the solution is :

Rf = 0.697

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