What can you conclude from a student who reported an Rf value of 1.2? Mark – [Free] B99
What can you conclude from a student who reported an Rf value of 1.2? Mark all that apply.
Rf Value Analysis in Chromatography
Question:
What can you conclude from a student who reported an Rf value of 1.2?
Understanding Rf: The Rf value (retardation factor) is defined as:
Rf = (Distance traveled by compound) / (Distance traveled by solvent front)
The value of Rf must logically fall between 0 and 1 (inclusive), because a compound cannot move farther than the solvent front in chromatography.
Conclusion:
- An Rf value of
1.2is not physically possible. - This suggests that the student likely made an error in:
- Measuring the distance traveled by the solvent or the compound
- Calculating the Rf value incorrectly
Therefore, we can conclude:
✅ The reported Rf value is incorrect and exceeds the allowed range.
✅ A measurement or calculation mistake must have occurred.